Não informado. (1977). FAO Forestry Paper. Food and Agriculture Organization of the United Nations.
Chicago-referens (17:e uppl.)Não informado. FAO Forestry Paper. Rome: Food and Agriculture Organization of the United Nations, 1977.
MLA-referens (8:e uppl.)Não informado. FAO Forestry Paper. Food and Agriculture Organization of the United Nations, 1977.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.