Citation guide
A five-step workflow for quoting research PDFs: locate the passage, capture it verbatim with its page number, verify the quote against the source, format the citation in APA or MLA, and keep provenance so every claim stays traceable.
Updated 2026-07-22
How to cite a PDF, why page numbers matter for quotes, what page-cited evidence means, and how quotes get verified.
Cite the work the PDF contains — the journal article, report, or chapter — not the file format. Identify the authors, year, title, and source, add a DOI when one exists, and include the page number for any direct quote. WriteGo resolves this metadata from a DOI, arXiv ID, PubMed ID, or URL and formats the reference in APA 7, MLA 9, Chicago, BibTeX, or RIS.
Yes. APA 7 requires a page or paragraph locator for every direct quotation, and MLA 9 expects the page in the parenthetical citation. Beyond style rules, a page number is what lets a reader — or a reviewer — reopen the source and confirm the quote. A quote without a locator is a claim someone else has to hunt for.
Page-cited evidence is a verbatim quote stored together with the locator of where it appears: at minimum the page, ideally the paper version and character offsets too. WriteGo's ChatPDF attaches page citations to every answer and validates each cited quote verbatim against the retrieved excerpts, and the Literature Review Matrix stores quotes with page and character-offset locators.
Reopen the cited page and compare the quote character for character — transcription silently drifts, especially across OCR, line breaks, and hyphenation. In ChatPDF this check is automatic: an answer whose citations fail verbatim validation is demoted and not billed, evidence notes re-check their quotes, and restoring an old answer re-verifies every citation against the current document.
Skimming a summary is not locating evidence; you need the passage itself, on its page. ChatPDF renders the original pages immediately while server-side processing — including OCR for scanned pages — continues, and adds page search, zoom, and an extracted-text view. Asking the paper a question retrieves up to six evidence excerpts, each pointing at the pages the answer came from.
Copy the passage exactly — no silent fixes to spelling, tense, or punctuation — and record the page number at capture time, not during a later cleanup pass. In ChatPDF, evidence notes keep the exact quotes of a saved passage or answer; in the Literature Review Matrix, captured quotes carry paper-version, page, and character-offset locators.
Before a quote enters your draft, confirm it still matches the source word for word. ChatPDF validates every cited quote verbatim against the retrieved excerpts before an answer is delivered — an answer whose citations fail is demoted and not billed. Tables, equations, and charts rarely extract cleanly, so manual transcriptions go to a visual-evidence register that stays marked needs-review until you verify them against the original page.
A page-cited quote needs two parts: the in-text citation with the page — author, year, and page in APA 7; author and page in MLA 9 — and the full reference entry. Resolve the entry from the paper's DOI, arXiv ID, PubMed ID, or URL rather than retyping metadata, and export it in APA 7, MLA 9, Chicago, BibTeX, or RIS.
A quote that loses its source decays into an unverifiable claim. WriteGo keeps per-field provenance on references, so you can see whether each value was resolved, imported, or edited. Reference-only source packages carry paper fingerprints, page numbers, and character offsets downstream to Writer Agent and Integrity Review, with evidence-level return links back to where each claim came from.
The style your course, journal, or team requires. In every major style you cite the article itself — the PDF is only the carrier — so the entry looks the same as for the published article, with a DOI when one exists. WriteGo exports APA 7, MLA 9, Chicago, BibTeX, and RIS.
Use the most stable locator available. APA 7 accepts paragraph numbers or section headings when pages are absent. For scanned files, WriteGo's server OCR extracts text by page, so a page-level locator usually still exists, and character offsets in the Literature Review Matrix pin quotes tighter than a page ever could.
No — ChatPDF is a single-paper reader. Cross-paper evidence, the 5–30 paper matrix, and the reference workflows live in the Literature Review Matrix, which keeps its own paper library, isolated from ChatPDF's on the backend.
Yes. Every answer is generated from up to six retrieved excerpts, each page citation carries a quote that is validated verbatim against those excerpts, and an answer that fails validation is demoted and not billed. A reply saying the document cannot answer the question is not billed either.