एपीए उद्धरण

O'Sullivan, P. (1981). Geographical economics. New York: Wiley.

शिकागो स्टाइल उद्धरण

O'Sullivan, Patrick. Geographical Economics. New York: Wiley, 1981.

एमएलए उद्धरण

O'Sullivan, Patrick. Geographical Economics. New York: Wiley, 1981.