Παραπομπή σε μορφή APA (7η εκδ.)

Colman, D., & Young, T. (1989). Principles of agricultural economics: Markets and prices in less developed countries. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Colman, David, και Trevor Young. Principles of Agricultural Economics: Markets and Prices in Less Developed Countries. New York: Cambridge University Press, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Colman, David, και Trevor Young. Principles of Agricultural Economics: Markets and Prices in Less Developed Countries. Cambridge University Press, 1989.