You can't extract the contents of other people's papers in a university graduation thesis.

Reference can refer to. You can go to the library to find some famous books, especially books related to your thesis, and then write the titles of references at the bottom of the thesis.

Copying the contents of a book on paper usually refers to the contents of a book, so you can copy down the contents of the book. However, it must be noted that it is taken from a book written by XXX. If you don't indicate an excerpt from a book, it is infringement. Therefore, it is ok to copy the contents of the paper, but it cannot be infringed, and the relevant intellectual property regulations must be observed.