กุลเกียรติประวัติ ป. and หิรัญญสมบูรณ์ ก. (2019) “Opinion Level on the Quality in Thai Brand Cosmetic of User in Central Region of Thailand”, The Journal of Integrated Business Innovation and Sustainability (JIBIS). Bangkok, Thailand, 9(1), pp. 81–94. available at: https://so02.tci-thaijo.org/index.php/fam/article/view/214994 (accessed: 30 September 2026).