APA (7th ed.) Citation

Purves, W. K., Sadava, D., Orians, G. H., & Heller, H. C. (2004). Life, the science of biology (Seventh Edition.). VHPS/W. H. Freeman.

Chicago Style (17th ed.) Citation

Purves, William K., David Sadava, Gordon H. Orians, and H. Craig Heller. Life, the Science of Biology. Seventh Edition. Gordonsville, VA U.S.A: VHPS/W. H. Freeman, 2004.

MLA (9th ed.) Citation

Purves, William K., et al. Life, the Science of Biology. Seventh Edition. VHPS/W. H. Freeman, 2004.