Cita APA (7th ed.)
Freeman, D. (2006). Statistics (3rd ed.). W.W. Norton & Co..
Cita Chicago (17th ed.)
Freeman, David. Statistics. 3rd ed. New York: W.W. Norton & Co., 2006.
Cita MLA (9th ed.)
Freeman, David. Statistics. 3rd ed. W.W. Norton & Co., 2006.
Atenció: Aquestes cites poden no estar 100% correctes.