APA引文

Crystal, D. (2004). The Penguin book of facts. New York: Penguin Books.

Trích dẫn kiểu Chicago

Crystal, David. The Penguin Book of Facts. New York: Penguin Books, 2004.

MLA引文

Crystal, David. The Penguin Book of Facts. New York: Penguin Books, 2004.

警告:這些引文格式不一定是100%准確.