Trakulkasamsiri, S. “Cost reduction of crossmatching by Type and screen protocol in Obstetrics patients at Queen Savang Vadhana Memorial Hospital, Thai Red Cross Society”. Journal of Associated Medical Sciences, vol. 40, no. 2, Feb. 2015, p. 114, https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60134.