APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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