APA (7e ed.) Bronvermelding

Purves, W. K. (1998). Life: The science of biology (5th.ed.). Sinauer associates.

Chicago (17e ed.) Bronvermelding

Purves, William K. Life: The Science of Biology. 5th.ed. Salt Lake City: Sinauer associates, 1998.

MLA (9e ed.) Bronvermelding

Purves, William K. Life: The Science of Biology. 5th.ed. Sinauer associates, 1998.