Jangruxsakul, Sirat, Chintanai Praisont, and Kittichai Athikulrat. 2023. “Improving Efficiency in the Housekeeping Operations Processes in Hotel Service Industry”. Dusit Thani College Journal 17 (2):61-75. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/269358.