Não informado. (1964). International agricultural development. International Agricultural Development Service.
Chicago-Zitierstil (17. Ausg.)Não informado. International Agricultural Development. Washington: International Agricultural Development Service, 1964.
MLA-Zitierstil (8. Ausg.)Não informado. International Agricultural Development. International Agricultural Development Service, 1964.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.