Kritsadathan, T, C Phithakham, and W Piyamongkol. 2019. “Antibiotic Prophylaxis in Vaginal Delivery of Normal Term Labour at Maharaj Nakorn Chiang Mai Hospital, Chiang Mai”. Chiang Mai Medical Journal 58 (4), 233-43. https://he01.tci-thaijo.org/index.php/CMMJ-MedCMJ/article/view/227788.