एपीए उद्धरण

Petrson, R. T. (1963). birds. Time-Life Books.

शिकागो स्टाइल उद्धरण

Petrson, Roger Tory. Birds. New York: Time-Life Books, 1963.

एमएलए उद्धरण

Petrson, Roger Tory. Birds. Time-Life Books, 1963.