Handayani, T. S., S. Wichaikull, and W. Boonpleng. “The Effect of Self-Efficacy for Smoking-Refusal Program in Junior High School Males, Bengkulu, Indonesia”. Journal of Health Research, vol. 29, no. Suppl. 1, Mar. 2017, pp. S45-S52, https://he01.tci-thaijo.org/index.php/jhealthres/article/view/79890.