Thaveesri, M. B., R. C. Sakulbamrungsil, N. Thongnopnua, A. Theeraroungchaisri, C.-O. Sooksriwong, and W. Tongrod. “Willingness to Smoking Among College Students: A Modification of Theory of Planned Behavior”. Journal of Health Research, vol. 26, no. 6, May 2017, pp. 297-03, https://he01.tci-thaijo.org/index.php/jhealthres/article/view/85486.