Chatchanok Chuaynual และ Anadi Nitithamyong. (2014) Extraction of a natural colorant from dragon fruit peel and determination of its properties. Mahidol University:ม.ป.ท.Chatchanok Chuaynual และ Anadi Nitithamyong. 2014. Extraction of a natural colorant from dragon fruit peel and determination of its properties. ม.ป.ท.:Mahidol University;Chatchanok Chuaynual และ Anadi Nitithamyong. Extraction of a natural colorant from dragon fruit peel and determination of its properties. ม.ป.ท.:Mahidol University, 2014. Print.