Não informado. (1970). Extension Bulletin. Asian and Pacific Council, Food and Fertilizer Technology Center.
Chicago-referens (17:e uppl.)Não informado. Extension Bulletin. Taipei: Asian and Pacific Council, Food and Fertilizer Technology Center, 1970.
MLA-referens (8:e uppl.)Não informado. Extension Bulletin. Asian and Pacific Council, Food and Fertilizer Technology Center, 1970.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.