एपीए उद्धरण

Krebs, C. J. (1999). Ecological methodology (2nd ed.). Menlo Park, Calif.: Benjamin/Cummings.

शिकागो स्टाइल उद्धरण

Krebs, Charles J. Ecological Methodology. 2nd ed. Menlo Park, Calif.: Benjamin/Cummings, 1999.

एमएलए उद्धरण

Krebs, Charles J. Ecological Methodology. 2nd ed. Menlo Park, Calif.: Benjamin/Cummings, 1999.