Poopayang, Prapasri, Somsak Suthutvoravut, Sunya Patrachai, and Pratana Satitvipawee. “Factors Associated with Adolescent Pregnancy in A Rural District of Kalasin Province, Thailand”. Research Medical Journal 38, no. 4 (December 29, 2015): 284–293. accessed September 21, 2026. https://he02.tci-thaijo.org/index.php/ramajournal/article/view/57464.