Philippine Council for Agriculture, Forestry and Natural Resources Research and Development. (1987). Improved cultivars of ampalaya. PCARRD.
Chicago (17e ed.) BronvermeldingPhilippine Council for Agriculture, Forestry and Natural Resources Research and Development. Improved Cultivars of Ampalaya. Los Banos, Laguna: PCARRD, 1987.
MLA (9e ed.) BronvermeldingPhilippine Council for Agriculture, Forestry and Natural Resources Research and Development. Improved Cultivars of Ampalaya. PCARRD, 1987.
Let op: Deze citaties zijn niet altijd 100% accuraat.