APA引文

(1991). Reference and information services: An introduction. Englewood, Colorado: Libraries Unlimited, Inc.

Trích dẫn kiểu Chicago

Reference and Information Services: An Introduction. Englewood, Colorado: Libraries Unlimited, Inc, 1991.

MLA引文

Reference and Information Services: An Introduction. Englewood, Colorado: Libraries Unlimited, Inc, 1991.

警告：这些引文格式不一定是100％准确.