एपीए उद्धरण

Gordon Wrigley. (1981). Tropical agriculture: The development of production. London: Longman.

शिकागो स्टाइल उद्धरण

Gordon Wrigley. Tropical Agriculture: The Development of Production. London: Longman, 1981.

एमएलए उद्धरण

Gordon Wrigley. Tropical Agriculture: The Development of Production. London: Longman, 1981.