APA (7th ed.) Zitazioa
Purves, W. K. (1998). Life: The science of biology (5th.ed.). Sinauer associates.
Chicago Style (17th ed.) Zitazioa
Purves, William K. Life: The Science of Biology. 5th.ed. Salt Lake City: Sinauer associates, 1998.
MLA (9th ed.) Zitazioa
Purves, William K. Life: The Science of Biology. 5th.ed. Sinauer associates, 1998.
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