The Role of Customer Loyalty in Mediating Relationship Marketing and Brand Image Effects on Customer Retention in Non-Formal Education. JISIP (Jurnal Ilmu Sosial dan Pendidikan), [S. l.], v. 10, n. 2, p. 1000–1016, 2026. DOI: 10.58258/jisip.v10i2.10326. Disponível em: https://ejournal.mandalanursa.org/index.php/JISIP/article/view/10326. Acesso em: 21 jun. 2026.