INGAN UKUR BR SITEPU; MENANTI SEMBIRING. Kualitas Pelayanan Dalam Meningkatkan Loyalitas Pelanggan Di Reddoorz Peceren Berastagi. Joong-Ki : Jurnal Pengabdian Masyarakat, [S. l.], v. 3, n. 1, p. 36–41, 2023. DOI: 10.56799/joongki.v3i1.2365. Disponível em: https://journal-nusantara.com/index.php/Joong-Ki/article/view/2365. Acesso em: 3 jul. 2024.