APA ציטוט

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.

ציטוט MLA

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