APA引文

Kaufmann, W. J. (1999). Universe (5th ed.). New York: W.H. Freeman.

Trích dẫn kiểu Chicago

Kaufmann, William J. Universe. 5th ed. New York: W.H. Freeman, 1999.

MLA引文

Kaufmann, William J. Universe. 5th ed. New York: W.H. Freeman, 1999.

警告：這些引文格式不一定是100％准確.