Modhuang, Chanarin, and Kamolthip Kamchai. 2018. “9Ps Model Affecting to the Consumer’s Behavior of Local Brand Coffee Consumers in Muang District, Chiangmai Province”. RMUTL Journal of Business Administration and Liberal Arts 6 (1):32-40. https://so05.tci-thaijo.org/index.php/balajhss/article/view/125982.