APA (7th ed.) Zitazioa

Upton, M. (1996). The economics of tropical farming systems. Cambridge University Press.

Chicago Style (17th ed.) Zitazioa

Upton, Martin. The Economics of Tropical Farming Systems. Cambridge ; New York: Cambridge University Press, 1996.

MLA (9th ed.) Zitazioa

Upton, Martin. The Economics of Tropical Farming Systems. Cambridge University Press, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.