“BARRIERS AND STRATEGIES OF CUSTOMER SERVICE IN RESOLVING CUSTOMER COMPLAINTS”, ERRABHA, vol. 1, no. 1, hlm. 26–32, Jul 2026, Diakses: 31 Juli 2026. [Daring]. Tersedia pada: https://errabha.ekos.staisalafiyahbangil.ac.id/errabha/article/view/7