एपीए उद्धरण

Eric R Pianka. (1994). Evolutionary ecology. New York: Harper Collins.

शिकागो स्टाइल उद्धरण

Eric R Pianka. Evolutionary Ecology. New York: Harper Collins, 1994.

एमएलए उद्धरण

Eric R Pianka. Evolutionary Ecology. New York: Harper Collins, 1994.