Punroob, Jittra, Ekachai Duangjai, and Apinya Kanthiya. “Casual Factors Influencing for Competitive Advantage of the Product from Community Enterprise, Mueang District, Nan Province”. Ph.D. in Social Sciences Journal 11, no. 2 (August 30, 2021): 520–535. Accessed April 19, 2024. https://so05.tci-thaijo.org/index.php/phdssj/article/view/220265.