Wulanda, O. D., Andri Wibowo, Nensi Lapotulo, Devid Trinaldo Simatupang, and I Wayan Thariqy Kawakibi Pristiwasa. “STUDI EVALUASI OUTSOURCING PADA ASPEK PELAYANAN TAMU DI HOTEL HARMONI KOTA BATAM”. Journal of Innovation Research and Knowledge, vol. 4, no. 6, Nov. 2024, pp. 3583-94, https://bajangjournal.com/index.php/JIRK/article/view/8870.