1. Library website: Some university libraries will provide book inquiry and lending services on their websites. You can check the collection information of the library online to see if you can borrow this book. If it is not convenient to borrow, you can consider buying through online bookstores and physical bookstores.

2. Online Bookstore: In some large online bookstores, you can search and buy books collected by university libraries. For example, Amazon, Dangdang and other online bookstores provide a large number of books in university libraries.

3. Physical Bookstore: If you are near the university or downtown, you can also go to a local large bookstore or professional bookstore for consultation and purchase. You can check whether there are books in the store by phone or online and make a purchase. In short, if you need to buy books from university libraries, you can make relevant inquiries and purchases through these channels.