Styl cytowania APA

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

Styl cytowania Chicago

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

Styl cytowania MLA

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