Nadeak, Samuel Revival. “Implementation of CHSE (Cleanliness, Health, Safety, and Environmental Sustainability) in the Housekeeping Department for Guest Convenience at The Reiz Suites Medan”. Jurnal Online Mahasiswa, vol. 1, no. 2, Apr. 2023, http://jom.poltekparmedan.ac.id/index.php/jomph/article/view/61.