Thitarat Worawit และ Dissatat Prasertsakul. (2013) Factors influencing consumers perceived healthiness and willingness to use functional drinks in Thailand. Mahidol University:ม.ป.ท.Thitarat Worawit และ Dissatat Prasertsakul. 2013. Factors influencing consumers perceived healthiness and willingness to use functional drinks in Thailand. ม.ป.ท.:Mahidol University;Thitarat Worawit และ Dissatat Prasertsakul. Factors influencing consumers perceived healthiness and willingness to use functional drinks in Thailand. ม.ป.ท.:Mahidol University, 2013. Print.