Ruthenberg,Hans. (1985). Innovation policy for small farmers in the tropics: The economics of technical innovation for agricultural development. Clarendon Press.
Chicago Edition CitationRuthenberg,Hans. Innovation Policy for Small Farmers in the Tropics: The Economics of Technical Innovation for Agricultural Development. Oxford: Clarendon Press, 1985.
MLA引文Ruthenberg,Hans. Innovation Policy for Small Farmers in the Tropics: The Economics of Technical Innovation for Agricultural Development. Clarendon Press, 1985.
警告：這些引文格式不一定是100％准確.