एपीए उद्धरण

Halfon, E. (1979). Theoratical systems ecology. Academic Press.

शिकागो स्टाइल उद्धरण

Halfon, E. Theoratical Systems Ecology. New York: Academic Press, 1979.

एमएलए उद्धरण

Halfon, E. Theoratical Systems Ecology. Academic Press, 1979.