Philippines. Bureau of Forestry. Annual report of the director of forestry.
Chicago-referens (17:e uppl.)Philippines. Bureau of Forestry. Annual Report of the Director of Forestry. Manila.
MLA-referens (8:e uppl.)Philippines. Bureau of Forestry. Annual Report of the Director of Forestry.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.