APA aipamena

Charles J. Krebs. (2001). Ecology. San Francisco: Benjamin Cummings.

Chicago Style aipamena

Charles J. Krebs. Ecology. San Francisco: Benjamin Cummings, 2001.

MLA aipamena

Charles J. Krebs. Ecology. San Francisco: Benjamin Cummings, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.