Chongpensuklert, Y., Kaewrudee, S., Soontrapa, S., & Sakondhavut, C. (2008). Dysmenorrhea in Thai Secondary School Students in Khon Kaen, Thailand. Thai Journal of Obstetrics and Gynaecology, 16(1), 47–53. retrieved from https://he02.tci-thaijo.org/index.php/tjog/article/view/82306