APA引文

Freedman, R. A. (2005). Universe. New York: W. H. Freeman and Company.

Trích dẫn kiểu Chicago

Freedman, Roger A. Universe. New York: W. H. Freeman and Company, 2005.

MLA引文

Freedman, Roger A. Universe. New York: W. H. Freeman and Company, 2005.

警告：这些引文格式不一定是100％准确.