Chansin, W., J. Manonai, R. Wattanayingcharoenchai, and K. Aimjirakul. “Postpartum Use of Long-Acting Reversible Contraception in Primiparous Women: Ramathibodi Hospital’s Experiences”. Thai Journal of Obstetrics and Gynaecology, vol. 22, no. 1, Jan. 2014, pp. 29-36, https://he02.tci-thaijo.org/index.php/tjog/article/view/12508.