Citazione Stile APA (7a Edizione)

Purves, W. K. (1998). Life: The science of biology (5th ed.). Sinauer Associates.

Citazione stile Chigago Style (17a edizione)

Purves, William K. Life: The Science of Biology. 5th ed. Sunderland, Massachusetts: Sinauer Associates, 1998.

Citatione MLA (9a ed.)

Purves, William K. Life: The Science of Biology. 5th ed. Sinauer Associates, 1998.