एपीए उद्धरण

Pianka,Eric R. (1974). Evolutinary ecology. Harper& Row.

शिकागो स्टाइल उद्धरण

Pianka,Eric R. Evolutinary Ecology. London: Harper& Row, 1974.

एमएलए उद्धरण

Pianka,Eric R. Evolutinary Ecology. Harper& Row, 1974.