APA (7th ed.) Citation

Ruthenberg, H., MacArthur, J. D., Zandstra, H. D., & Collinson, M. P. (1980). Farming systems in the tropics (3rd ed.). Clarendon Press, Oxford University Press.

Chicago Style (17th ed.) Citation

Ruthenberg, Hans, J. D. MacArthur, H. D. Zandstra, and M. P. Collinson. Farming Systems in the Tropics. 3rd ed. Oxford : New York: Clarendon Press, Oxford University Press, 1980.

MLA (9th ed.) Citation

Ruthenberg, Hans, et al. Farming Systems in the Tropics. 3rd ed. Clarendon Press, Oxford University Press, 1980.