Mutiara, Piala, Rasmi Sitohang, Linda Mariaty, Johana Sihol Marito Purba, & Nalom Dahlan Marpaung. " PELAYANAN PRIMA JASA HOTEL CAMBRIDGE MEDAN."
PKM Maju UDA
[Online], 5.1 (2024): 10 - 16. Web. 28 Apr. 2025