กังขาว สุรศักดิ์, and เลาหะเพ็ญแสง จตุรงค์. 2017. “MASTER PLAN DEVELOPMENT ON CREATIVE TOURISM STRATEGY FOR SPECIALIZED MONUMENTAL AREAS OF HISTORICAL DISTRICTS-SUKHOTHAI, SI SATCHANALAI, AND KAMPHAENGPHET”. Journal of Industrial Education 16 (1):50-57. https://ph01.tci-thaijo.org/index.php/JIE/article/view/123860.