APA (7th ed.) Citation

Purves, W. K., Heller, H. G., & Orians, G. H. (1992). Life: The science of biology (3rd ed.). Sinauer Associates, Inc.

Chicago Style (17th ed.) Citation

Purves, William K., H. Graig Heller, and Gordon H. Orians. Life: The Science of Biology. 3rd ed. Sunderland: Sinauer Associates, Inc, 1992.

MLA (8th ed.) Citation

Purves, William K., et al. Life: The Science of Biology. 3rd ed. Sinauer Associates, Inc, 1992.