एपीए उद्धरण

Pechenik, J. A. (1997). A short guide to writing about biology (3rd ed.). New York: Longman.

शिकागो स्टाइल उद्धरण

Pechenik, Jan A. A Short Guide to Writing About Biology. 3rd ed. New York: Longman, 1997.

एमएलए उद्धरण

Pechenik, Jan A. A Short Guide to Writing About Biology. 3rd ed. New York: Longman, 1997.