Windy Stevani Siahaan, & Dendi Gusnadi. (2024). Implementasi Standar Operasional Prosedur Telepon Operator di Sheraton Hotel Bandung. El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam, 5(9), 4077 –. https://doi.org/10.47467/elmal.v5i9.4255