PUTRA, Dimas Herlambang; IRIANI, Iriani. Analysis of Service Quality and Customer Satisfaction for Umrah at PT. Allinma Universal Using the Potential Gain in Customer Value Method. IJIEM - Indonesian Journal of Industrial Engineering and Management, Jakarta, Indonesia, v. 5, n. 2, p. 339–349, 2024. DOI: 10.22441/ijiem.v5i2.21988. Disponível em: https://training-ojs3-publikasi.mercubuana.ac.id/index.php/ijiem/article/view/21988. Acesso em: 28 may. 2026.