Cita APA (7th ed.)
Bretz, J. H. (1932). The Grand Coulee. American Geographical Soc.
Cita Chicago (17th ed.)
Bretz, J. Harlen. The Grand Coulee. New York: American Geographical Soc, 1932.
Cita MLA (9th ed.)
Bretz, J. Harlen. The Grand Coulee. American Geographical Soc, 1932.
Atenció: Aquestes cites poden no estar 100% correctes.