एपीए उद्धरण

Krebs, J. R. (1981). An introduction to behavioural ecology. Sunderland, Mass: Sinauer Associates Inc.

शिकागो स्टाइल उद्धरण

Krebs, J. R. An Introduction to Behavioural Ecology. Sunderland, Mass: Sinauer Associates Inc, 1981.

एमएलए उद्धरण

Krebs, J. R. An Introduction to Behavioural Ecology. Sunderland, Mass: Sinauer Associates Inc, 1981.