Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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