एपीए उद्धरण

Gould, S. J. (1977). Ever since Darwin. New York: Penguin Books.

शिकागो स्टाइल उद्धरण

Gould, Stephen Jay. Ever Since Darwin. New York: Penguin Books, 1977.

एमएलए उद्धरण

Gould, Stephen Jay. Ever Since Darwin. New York: Penguin Books, 1977.