GINTING, Y. M.; CHANDRA, T.; OKTARIYANTO, O.; ENDRAWATI, E. A Study Of Servqual And Customer Satisfaction Using Customer Satisfaction Index (Csi), Importance Performance Analysis (Ipa) And Improvement Factor (If) Method. Economics and Digital Business Review, [S. l.], v. 5, n. 1, p. 373–393, 2023. DOI: 10.37531/ecotal.v5i1.738. Disponível em: https://ojs.stieamkop.ac.id/index.php/ecotal/article/view/738. Acesso em: 12 aug. 2026.