Itthiophakorn, D. . . “TOURIST’S PERCEPTION OF BUFFET’S FOOD WASTE IN HOTELS IN BANGKOK”. Dusit Thani College Journal, vol. 15, no. 1, Apr. 2021, pp. 83-99, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/247427.