Παραπομπή APA

Upton, M. (1996). Economic of Tropical Farming systems. Cambridge University Press.

Παραπομπή Chicago Style

Upton, Martin. Economic of Tropical Farming Systems. Cambridge: Cambridge University Press, 1996.

Παραπομπή MLA

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