APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Purves, William Kirkwood, and Gordon H. Orians. Life: The Science of Biology. Sinauer Associates: W. Grant Press, 1983.

MLA (9th ed.) Citation

Purves, William Kirkwood, and Gordon H. Orians. Life: The Science of Biology. W. Grant Press, 1983.