APA (7th ed.) Citation

Ruthenberg, H. (1971). Farming systems in the tropics. Clarendon Pr.

Chicago Style (17th ed.) Citation

Ruthenberg, Hans. Farming Systems in the Tropics. Oxford: Clarendon Pr, 1971.

MLA (9th ed.) Citation

Ruthenberg, Hans. Farming Systems in the Tropics. Clarendon Pr, 1971.

Warning: These citations may not always be 100% accurate.