Chongsuvivatwong, Virasakdi, and Tippawan Liabsuetrakul. “Methodology Issues in Reproductive Health Research”. Thai Journal of Obstetrics and Gynaecology 19, no. 1 (April 5, 2017): 4–6. accessed September 28, 2026. https://he02.tci-thaijo.org/index.php/tjog/article/view/82180.