APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.