Não informado. (1958). Cocoa statistics. Food and Agriculture Organization of the United Nations.
Chicago-referens (17:e uppl.)Não informado. Cocoa Statistics. Rome: Food and Agriculture Organization of the United Nations, 1958.
MLA-referens (8:e uppl.)Não informado. Cocoa Statistics. Food and Agriculture Organization of the United Nations, 1958.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.