Citazione Stile APA (7a Edizione)

PURVES, W. K., & ORIANS, G. H. (1983). Life: The science of biology. Sinauer Associates Williard Grant Press.

Citazione stile Chigago Style (17a edizione)

PURVES, William K., e Gordon H. ORIANS. Life: The Science of Biology. Sunderland: Sinauer Associates Williard Grant Press, 1983.

Citatione MLA (9a ed.)

PURVES, William K., e Gordon H. ORIANS. Life: The Science of Biology. Sinauer Associates Williard Grant Press, 1983.