Ornamphai Suwithayapan และ Nattawat Nattapulwat. (2008) Preparation and application of carboxymethyl yam (Dioscorea esculenta) starch. Silpakorn University:ม.ป.ท.Ornamphai Suwithayapan และ Nattawat Nattapulwat. 2008. Preparation and application of carboxymethyl yam (Dioscorea esculenta) starch. ม.ป.ท.:Silpakorn University;Ornamphai Suwithayapan และ Nattawat Nattapulwat. Preparation and application of carboxymethyl yam (Dioscorea esculenta) starch. ม.ป.ท.:Silpakorn University, 2008. Print.