APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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