APA (7th ed.) Citation

Wallace, G. J. (1955). An introduction to Ornithology. Macmillan.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Wallace, George J. An Introduction to Ornithology. Macmillan, 1955.