Tanapat Manee และ Suvit Bunyavejchevin; Purim Ruanphoo; Keerati Chiengthong; Parima Manusook. (2024) The Incidence and Risk Factors of Obstetrics anal Sphincter Injuries at King Chulalongkorn Memorial Hospital during 2017-2019. <i>Thai Journal of Obstetrics and Gynaecology</i>, <i>32</i>(6), 481-489.Tanapat Manee และ Suvit Bunyavejchevin; Purim Ruanphoo; Keerati Chiengthong; Parima Manusook. "The Incidence and Risk Factors of Obstetrics anal Sphincter Injuries at King Chulalongkorn Memorial Hospital during 2017-2019". Thai Journal of Obstetrics and Gynaecology 32 (2024):481-489.Tanapat Manee และ Suvit Bunyavejchevin; Purim Ruanphoo; Keerati Chiengthong; Parima Manusook. The Incidence and Risk Factors of Obstetrics anal Sphincter Injuries at King Chulalongkorn Memorial Hospital during 2017-2019. PIMDEE Co. Ltd.:ม.ป.ท. 2024.