Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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