APA Style
Ruthenberg, Hans. (1971).
Farming systems in the tropics .
Oxford:
Clarendon Press.
Chicago Style
Ruthenberg, Hans.
Farming systems in the tropics.
Oxford:
Clarendon Press,
1971.
Text.
MLA Style
Ruthenberg, Hans.
Farming systems in the tropics.
Oxford:
Clarendon Press,
1971.
Text.
Turabian Style
Ruthenberg, Hans.
Farming systems in the tropics.
Oxford:
Clarendon Press,
1971.
Print.