Cita APA

Robbins, C. S. 1., Bruun, B. 1., Zim, H. S. 1., & Singer, A. 1. (1966). A guide to field identification birds of North America. New York: Golden Press.

Citación estilo Chicago

Robbins, Chandler Seymour 1918-2017, Bertel 1937-2011 Bruun, Herbert Spencer 1909-1994 Zim, y Arthur 1917-1990 Singer. A Guide to Field Identification Birds of North America. New York: Golden Press, 1966.

Cita MLA

Robbins, Chandler Seymour 1918-2017, Bertel 1937-2011 Bruun, Herbert Spencer 1909-1994 Zim, y Arthur 1917-1990 Singer. A Guide to Field Identification Birds of North America. New York: Golden Press, 1966.