Philippine Islands. Department of Agriculture and Natural Resources. (1931). Annual report. [The Department].
Chicago-referens (17:e uppl.)Philippine Islands. Department of Agriculture and Natural Resources. Annual Report. Manila: [The Department], 1931.
MLA-referens (9:e uppl.)Philippine Islands. Department of Agriculture and Natural Resources. Annual Report. [The Department], 1931.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.