Cita APA (7a ed.)

Mayr, E. (1942). Systematics and the origin of species: From the viewpoint of a zoologist. Columbia University Press.

Cita Chicago Style (17a ed.)

Mayr, Ernst. Systematics and the Origin of Species: From the Viewpoint of a Zoologist. New York: Columbia University Press, 1942.

Cita MLA (8a ed.)

Mayr, Ernst. Systematics and the Origin of Species: From the Viewpoint of a Zoologist. Columbia University Press, 1942.