Husaini F, Dewi Shinta Wulandari Lubis. The Role Of Supervisors And Standard Operating Procedures For Cleaning Rooms In Improving The Performance Of Employees Housekeeping Department Hotel Grand Mercure Medan. Jurnal Ekonomi [Internet]. 2024 Jun. 11 [cited 2024 Dec. 5];13(02):1316-28. Available from: https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/4643