APA (7th ed.) Citation

SIMPSON, G. G., & BECK, W. S. (1965). Life an intorduction to biology. Harcourt, Brace & World.

Chicago Style (17th ed.) Citation

SIMPSON, George Gaylord, and William S. BECK. Life an Intorduction to Biology. Harcourt, Brace & World, 1965.

MLA (8th ed.) Citation

SIMPSON, George Gaylord, and William S. BECK. Life an Intorduction to Biology. Harcourt, Brace & World, 1965.

Warning: These citations may not always be 100% accurate.