Thirty months into her PhD, a doctoral student needs a sentence about “dropout rates being higher in rural than urban schools” that she is certain she read. She knows it was an English-language article from around 2019 with a table in the middle pages. Her folder holds 420 PDFs, half of them named like “1-s2.0-S0272…pdf”. She spends the whole afternoon and never finds it.
That is not a memory problem. It happens because the system was built for the thirty papers of year one, not the four hundred of the writing year. This article describes a system you set up once at the start and use until submission day.
The four layers of a reference system
| Layer | Purpose | Typical tools |
|---|---|---|
| Capture | Get sources and their metadata into one place | Reference manager, browser connector, DOI import |
| Organise | Know which chapter, topic and reading status each source has | Collections by chapter, tags for topic and status |
| Notes | Record what you took from it, in your words, searchably | Notes attached to the reference, or a linked notes app |
| Writing | Insert citations and bibliographies automatically | Word-processor plugin, BibTeX file for LaTeX |
Most students only do layer one and discover the other three are missing when they start writing.
Capture: get it right on the way in
- Always import through your reference manager, never by saving PDFs straight to a folder. Browser connectors for Zotero and similar tools grab both metadata and the file.
- Check metadata on import: authors, year, journal, pages. Automatic data is often wrong for books, chapters, theses and non-English sources, for instance splitting names incorrectly.
- Let the software rename files to a fixed pattern such as Author_Year_First-words-of-title.
- Heed retraction alerts. Some tools, Zotero among them, flag items in your library that have been retracted. Do not ignore the flag.
Organise: collections by chapter, tags for everything else
Create collections that mirror your provisional thesis structure: Chapter 1 Introduction, Chapter 2 Literature, Chapter 3 Methods, and so on. An item can sit in several collections without duplicating files.
Use tags for three other kinds of information:
- Reading status: “unread”, “skimmed”, “read closely”, “key source”.
- Topic: concept, method, research setting.
- Role in your argument: “supports”, “challenges”, “model method”, “background data”.
Keep the tag set short, around twenty or thirty. A few hundred tags cannot be filtered by anyone, including you.
Notes: what year-three you will thank you for
Highlights in a PDF record what the author said. Notes record what you think about it. When writing, you need the second. A compact literature note template:
- The paper’s question: one sentence.
- Approach: design, sample, setting, in two or three lines.
- Key findings: with page numbers; any verbatim quotation in quotation marks with its page number right there.
- Limitations: what it could not do or did not do convincingly.
- Relevance to my thesis: which chapter, supporting or challenging what.
The last line matters most. It turns a summary into a building block for your argument. And separating verbatim quotation from paraphrase inside the note prevents accidental plagiarism later, when you no longer remember which sentences were yours.
Writing with it
- Install the citation plugin for your word processor and test it on a short document before a big chapter.
- With LaTeX or Overleaf, export to a BibTeX file, ideally with stable keys and automatic updates, such as Zotero with Better BibTeX. Do not hand-edit the BibTeX file.
- Choose your university’s required citation style from the start, so you are not changing hundreds of citations at the end.
- Check the bibliography before submission: non-English author names, title capitalisation and duplicate entries are the three most common problems.
Backups and expensive mistakes
- Syncing without backing up. Cloud sync faithfully syncs accidental deletions too. Keep an independent periodic backup.
- Running out of free storage without noticing, so new PDFs silently stop syncing. Check your service’s storage limits.
- Duplicate items, leading to one paper cited under two different keys. Run the merge-duplicates function regularly.
- Switching tools midway without exporting in the right format and losing notes. If you must switch, test export and import with a few dozen items first.
In practice: set it up in one afternoon
- Install the reference manager, browser connector and word-processor plugin.
- Create collections matching your provisional thesis structure and a starter set of fewer than thirty tags.
- Set up automatic file renaming.
- Re-import your ten most important sources and check each record’s details.
- Write template notes for three of them, including the “relevance to my thesis” line.
- Set up an independent backup and a monthly reminder.
The rest of your old library can migrate gradually, a few dozen items a week. From today, every new source goes through this system, and your writing year will be one of searches that take seconds rather than afternoons.
Câu hỏi thường gặp
Which reference manager should I use?
Zotero is free, open source and widely used in academia; EndNote and Mendeley are also common. More important than the choice is using one tool consistently from the start and knowing how to export your data if you ever need to switch.
Should I keep notes inside PDF files?
Highlighting in PDFs is convenient while reading, but important notes should live somewhere searchable and linked to the reference record. Notes locked inside hundreds of PDFs are very hard to reuse when writing.
How do I avoid wrong citation details?
Import references via DOI or a browser connector from the journal page, then check author names, year and pages before using them. Automatic metadata is sometimes wrong, especially for books, chapters and non-English sources.
Should I organise references by topic or by thesis chapter?
Use both: collections by chapter to see where a source is used, and tags by topic or status for cross-filtering. One item can sit in several collections without duplicating the file.
How do I connect a reference manager to Overleaf and LaTeX?
Export your library to a BibTeX file, ideally with automatic updates, for example Zotero with the Better BibTeX add-on for stable citation keys. Avoid hand-editing the BibTeX file, since the next export will overwrite it.
