F. D. Ardiyanto and Septi Wulandari, “PERAN PRODUCT KNOWLEDGE TELEPON OPERATOR DALAM MENINGKATKAN KUALITAS PELAYANAN TAMU DI LORIN HOTEL SOLO”, mb, vol. 5, no. 1, pp. 55–63, May 2024, doi: 10.70018/mb.v5i1.77.