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. 27 Dec. 2024