APA
Byerlee D., Harrington L. j. a. & Winkelmann D. L. j. a. (1982). Farming systems research. Washington, D.C: World Bank.
Chicago
Byerlee Derek, Harrington Larry joint author and Winkelmann Donald L joint author. 1982. Farming systems research. Washington, D.C: World Bank.
Harvard
Byerlee D., Harrington L. j. a. and Winkelmann D. L. j. a. (1982). Farming systems research. Washington, D.C: World Bank.
MLA
Byerlee Derek, Harrington Larry joint author and Winkelmann Donald L joint author. Farming systems research. Washington, D.C: World Bank. 1982.