Cita APA (7a ed.)
Ashley, J. (1999). Food crops and drought. Technical Centre for Agricultural and Rural Cooperation.
Cita Chicago Style (17a ed.)
Ashley, J. Food Crops and Drought. Technical Centre for Agricultural and Rural Cooperation, 1999.
Cita MLA (9a ed.)
Ashley, J. Food Crops and Drought. Technical Centre for Agricultural and Rural Cooperation, 1999.
Precaución: Estas citas no son 100% exactas.