1. format: different reference formats (such as APA, MLA, Chicago, etc. ) There are different requirements for the citation format of books. You need to choose the appropriate citation format according to your topic or the requirements of your tutor. Generally speaking, the citation information of books includes author, publication year, title, publishing house and page number.

2. Accuracy: When quoting books, you need to make sure that all the information is accurate. This includes the author's name, publication year, title, publishing house and page number. If possible, you should get this information directly from books, not from the internet.

3. completeness: when quoting a book, you need to provide enough information so that readers can find the book. This includes the author's name, publication year, title, publishing house and page number. If possible, the publishing place and edition should also be provided.

4. Consistency: Throughout the paper, you need to keep the citation format consistent. This means that you need to use the same citation format to quote all books, no matter when they were published or by which publishing house.

5. Avoid over-quoting: Although citing books can increase the credibility of your paper, over-quoting may make your paper look too long and complicated. Therefore, you should only quote those books that are directly helpful to your paper.

6. Cite second-hand materials: If you cite other people's comments or analysis of books, you need to point this out clearly and provide the information of original materials in the references.

7. Avoid plagiarism: When quoting books, you need to make sure that you don't copy other people's works. This means that you need to quote all the information correctly, and you can't copy any part of the book in your paper.