Não informado. (1967). FAO documentation. Food and Agriculture Organization of the United Nations.
Chicago-referens (17:e uppl.)Não informado. FAO Documentation. Rome: Food and Agriculture Organization of the United Nations, 1967.
MLA-referens (8:e uppl.)Não informado. FAO Documentation. Food and Agriculture Organization of the United Nations, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.