Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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