Purwanti, Niki Ayu, et al. “IMPLEMENTASI RELATIONSHIP MARKETING TERHADAP CUSTOMER LOYALITY PADA PT. BANK SUMUT KCP SYARIAH SIMPANG KAYU BESAR MELALUI CUSTOMER SATISFACTION”. JURNAL ILMIAH EDUNOMIKA, vol. 7, no. 2, May 2023, doi:10.29040/jie.v7i2.9091.