Phramongkoldhammavidhan, S. Thonglek, C. Saramart, and P. Punnavutdho. “Suggestion to Apply the Sappurisadhamma 7 to Use Prevent Premature Pregnancy Problems for Students of Nakhon Pathom Vocational College”. Research and Development Journal, Loei Rajabhat University, vol. 15, no. 52, June 2020, pp. 53-60, https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/241070.