Sirited, P., Kaowsoon, C. and Kongsin, C. (2020) “The result of knowledge development program and self-efficacy perception towards teenage pregnancy prevention in secondary school girls”, UBRU Journal for Public Health Research, 9(2), pp. 90–100. available at: https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/240577 (accessed: 30 September 2026).