Short answer: open the chapter PDF in a tool that cites its sources, ask a specific question, and ask for the supporting quote. In Sidenote, every answer cites the passage it came from: click the citation and the PDF jumps to that page and highlights the sentence, so the page reference is one you've seen yourself. Gemini Notebook also cites your uploaded sources. General chatbots will state a page number, but those are the ones to double-check.
Why page references matter when you study
A page reference turns an AI answer into something you can use: a quote for an essay, a definition you can trust in an exam, a place to re-read when the explanation doesn't click. Without one, you're trusting a fluent paragraph that may blend the textbook with the model's general knowledge, which is exactly where AI summaries go wrong. See do AI summaries hallucinate?
Three ways to do it
1. A citing reader in your browser
Open the chapter PDF in Chrome, Edge or Firefox with Sidenote and ask in the side panel. Answers come with numbered citations; clicking one scrolls the PDF to the exact page and highlights the sentence. Claims that can't be matched to a passage in the chapter are dropped before you see them. Scanned textbook pages are OCR'd on paid plans, and a Collection lets you ask across several chapters at once.
The free plan covers one document and three cited chat turns a month, enough to see whether it suits you. Studying a whole module realistically needs a paid plan.
2. A notebook of chapters in Gemini Notebook
Gemini Notebook, formerly NotebookLM, lets you upload chapters as sources, up to 50 sources per notebook on the free plan, and answers with citations to them. Its study features are strong: flashcards and quizzes, mind maps and Audio Overviews of the material. Usage now runs on a budget that refreshes every 5 hours, so long study sessions can hit the limit.
3. A general chatbot
You can attach a chapter to ChatGPT, Claude or Gemini and ask for page references. They're excellent for explanations and practice problems, but a page number they state without citing a passage needs checking. Our guides explain each one's file rules: ChatGPT, Claude and Gemini.
Questions that get page-accurate answers
Vague prompts get vague answers. These patterns work well:
- Definitions: "How does this chapter define opportunity cost? Quote the definition."
- Locating: "Where does the chapter explain the Krebs cycle? Cite the passage."
- Comparing: "What's the difference between mitosis and meiosis according to this chapter, with a quote for each?"
- Checking your notes: "My notes say the treaty was signed in 1648. Does the chapter support that? Quote it."
- Exam prep: "List the five key terms in section 4.2 with the sentence that defines each."
Turning verified answers into study material
Once an answer checks out, keep the page reference with it. A glossary of key terms with their defining sentences, a set of questions with the passages that answer them, or a summary where every point links back to the chapter is far more useful at revision time than a block of AI text. Sidenote can build a glossary from a document with each term linked to its source, and our guide to understanding academic papers covers the same method for readings beyond the textbook.
Use copies you have the right to use
Work from a textbook you own or one your library licenses, and follow your course's rules on AI use. Reading a PDF in your own browser keeps it on your machine's session rather than uploading a copy to another service, but the licence terms still apply.