Klunklin , A. .; Sawasdisingha, P. . .; Juntasopeepun, P. .; Vichittragoonthavorn, S. . .; Setteekul, , S. . .; Charoenpakdee , P. . THAI LANNA SPA ACCREDITATION CRITERIA DEVELOPMENT FOR WELLNESS TOURISM. Journaldtc 2021, 15, 431-453.