Cita APA

Wallace, G. J. (1955). An introduction to ornithology. New York: Macmillam.

Citación estilo Chicago

Wallace, George J. An Introduction to Ornithology. New York: Macmillam, 1955.

Cita MLA

Wallace, George J. An Introduction to Ornithology. New York: Macmillam, 1955.