Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.