(Mongkol Ekkaphan) ม. . เ., and (Apiradee Khamlai) อ. . ค. “Development of Indicators of Total Quality Management Toward Business Excellence of ISO 9001: 2015 Certified Companies in Thailand”. Sripatum Review of Humanities and Social Sciences, vol. 20, no. 2, Oct. 2020, pp. 44-59, https://so05.tci-thaijo.org/index.php/spurhs/article/view/236473.