Harsadin Sornpala หัสดินทร์ สอนปะละ. 2018. “Motivation and Marketing Mix Influencing Tourists’ Buying Behavior at Ceramic Outlet Lampang Province Thailand”. Dusit Thani College Journal 11 (1):205-23. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/135529.