Wannasri, S., M. Therawiwat, N. Imamee, and R. Chongsuwat. “Fruit and Vegetable Dietary Behaviors in Elementary School Students, Surat Thani Province, Thailand*”. Thai Journal of Health Education, vol. 36, no. 2, Feb. 2019, pp. 45-60, https://he01.tci-thaijo.org/index.php/muhed/article/view/174473.