Polpithige Chaya Prabhath Perera และผู้แต่งคนอื่นๆ. (2019) Consumers' Willingness to Pay for Liquid Milk in Sri Lanka. <i>Khon Kaen Agriculture Journal</i>, <i>47</i>(4), 851-863.Polpithige Chaya Prabhath Perera และผู้แต่งคนอื่นๆ. "Consumers' Willingness to Pay for Liquid Milk in Sri Lanka". Khon Kaen Agriculture Journal 47 (2019):851-863.Polpithige Chaya Prabhath Perera และผู้แต่งคนอื่นๆ. Consumers' Willingness to Pay for Liquid Milk in Sri Lanka. Faculty of Agriculture:ม.ป.ท. 2019.