Kanyapilai Kunchornsirimongkol. “PERCEPTION OF KITCHEN DEPARTMENT STAFF IN HOTEL TO IMPROVING SERVICE QUALITY FOR ELDERLY CUSTOMERS”. PalArch’s Journal of Archaeology of Egypt Egyptology, vol. 17, no. 7, Nov. 2020, pp. 8377-82, https://archives.palarch.nl/index.php/jae/article/view/3621.