Preeyaporn Harasai และ Noochanart Pattanapanyasat. (2020) Efficacy of a Single Dose Administration of Ibuprofen and Acetaminophen in Comparison with Acetaminophen for the Relief of Perineal Pain after Childbirth: A randomized controlled trial. <i>Thai Journal of Obstetrics and Gynaecology</i>, <i>28</i>(1), 24-33.Preeyaporn Harasai และ Noochanart Pattanapanyasat. "Efficacy of a Single Dose Administration of Ibuprofen and Acetaminophen in Comparison with Acetaminophen for the Relief of Perineal Pain after Childbirth: A randomized controlled trial". Thai Journal of Obstetrics and Gynaecology 28 (2020):24-33.Preeyaporn Harasai และ Noochanart Pattanapanyasat. Efficacy of a Single Dose Administration of Ibuprofen and Acetaminophen in Comparison with Acetaminophen for the Relief of Perineal Pain after Childbirth: A randomized controlled trial. PIMDEE Co. Ltd.:ม.ป.ท. 2020.