Daroj, Thanapon, Piyachat Chanidkul, and Weerada Trongtranonth. “Sites of cord insertion and delayed of the third stage of labor in single spontaneous delivery: a retrospective cohort study”. The Clinical Academia 43, no. 1 (April 3, 2019): 25–35. accessed September 21, 2026. https://he02.tci-thaijo.org/index.php/theclinicalacademia/article/view/169020.