(2006). The Philippines recommends for duck egg production (3rd ed.). Philippine Council for Agriculture, Forestry and Natural Resources Research and Development.
Chicago-referens (17:e uppl.)The Philippines Recommends for Duck Egg Production. 3rd ed. Los Baños, Laguna: Philippine Council for Agriculture, Forestry and Natural Resources Research and Development, 2006.
MLA-referens (9:e uppl.)The Philippines Recommends for Duck Egg Production. 3rd ed. Philippine Council for Agriculture, Forestry and Natural Resources Research and Development, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.