Densiriaksom, Suwit. “Knowledge, attitude and sexual behavior of secondaryschool students at a school, Nongkhai, Thailand”. Chulalongkorn Medical Journal 52, no. 2 (October 24, 2023). accessed September 11, 2026. https://he05.tci-thaijo.org/index.php/CMJ/article/view/1089.