APA (7th ed.) Citation

Purves, W. K., & Orians, G. H.. (1983). Life: Thje science of biology. Willard Grant Press.

Chicago Style (17th ed.) Citation

Purves, William K., and Gordon H. Orians. Life: Thje Science of Biology. Massachusetts: Willard Grant Press, 1983.

MLA (9th ed.) Citation

Purves, William K., and Gordon H. Orians. Life: Thje Science of Biology. Willard Grant Press, 1983.