HUTRIANSYAH HARAHAP; MHD. SHAFWAN KOTO; RIFKA HADIA LUBIS. PENGARUH RELATIONSHIP MARKETING DAN PROMOSI TERHADAP CUSTOMER LOYALITY JASA TRANSPORTASI PADA TRAVEL CV. FLORES SIBOLGA. JURNAL ILMIAH RESEARCH AND DEVELOPMENT STUDENT, [S. l.], v. 1, n. 2, p. 137–147, 2023. DOI: 10.59024/jis.v1i1.387. Disponível em: https://jurnal.alimspublishing.co.id/index.php/jis/article/view/387. Acesso em: 25 jul. 2026.