1. Alviansyah, R. (2020). Customer Relationship Management Information System for Promotion Strategy at PT. Multi Instrumentation (Doctoral Dissertation, Indonesian Computer University).
2. PENGARUH KUALITAS PELAYANAN DAN CITRA RUMAH SAKIT TERHADAP TINGKAT KEPUASAN PASIEN RAWAT INAP RUMAH SAKIT UMUM SUNDARI MEDAN TAHUN 2018
3. Azis Santoso, E. D. W. I. N. (2019). The Influence of Brand Image, Product Quality and Product Differentiation on Customer Satisfaction at the Shasya Cake Shop Company in Banjarsari District (Doctoral Dissertation, Siliwangi University).
4. Ferawati, A., Nurnajamuddin, M., & Suriyanti, S. (2023). The Influence of Service Quality and Satisfaction on Bank Rakyat Indonesia Customer Loyalty. SEIKO: Journal of Management & Business, 6(1), 776-783.
5. Griselda, Gretel and Young Tagor Panjaitan. (2017). Analysis of the Influence of Service Quality on Consumer Satisfaction at Pulau Dua Restaurant. UPH Management Journal, Vol.2, No.1, pp.39-62.