(1974). Cultural directions for Philippine agricultural crops (2nd ed.). Public Affairs Office, Bureau of Plant Industry.
Chicago-referens (17:e uppl.)Cultural Directions for Philippine Agricultural Crops. 2nd ed. Manila: Public Affairs Office, Bureau of Plant Industry, 1974.
MLA-referens (9:e uppl.)Cultural Directions for Philippine Agricultural Crops. 2nd ed. Public Affairs Office, Bureau of Plant Industry, 1974.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.