Kanyarat Wirotpong. 2007. Developing a healthy eating policy for preschool children : effects on diet and school policies in Phrae province, Thailand. Field of Study Dentistry, Chiang Mai University;
Kanyarat Wirotpong. (2007) Developing a healthy eating policy for preschool children : effects on diet and school policies in Phrae province, Thailand . Chiang Mai University/Chiang Mai.
Kanyarat Wirotpong. Developing a healthy eating policy for preschool children : effects on diet and school policies in Phrae province, Thailand. . Chiang Mai:Chiang Mai University, 2007.
Kanyarat Wirotpong. (2007) Developing a healthy eating policy for preschool children : effects on diet and school policies in Phrae province, Thailand . Chiang Mai University/Chiang Mai.