APA (7th ed.) Citation

Guyer, M. F. (1942). Speaking of man: A biologist looks at man. Harper & brothers.

Chicago Style (17th ed.) Citation

Guyer, Michael F. Speaking of Man: A Biologist Looks at Man. New York, London: Harper & brothers, 1942.

MLA (9th ed.) Citation

Guyer, Michael F. Speaking of Man: A Biologist Looks at Man. Harper & brothers, 1942.