Hutriansyah Harahap, Mhd. Shafwan Koto, & Rifka Hadia Lubis. (2023). PENGARUH RELATIONSHIP MARKETING DAN PROMOSI TERHADAP CUSTOMER LOYALITY JASA TRANSPORTASI PADA TRAVEL CV. FLORES SIBOLGA. JURNAL ILMIAH RESEARCH AND DEVELOPMENT STUDENT, 1(2), 137–147. https://doi.org/10.59024/jis.v1i1.387