MAHSUM, K.; MUHAMMED, P.; OMER, A. Provider-customer perceptions in service quality: A Gap analysis at Ishik University, Sulaimani. Economics, Management and Sustainability, [S. l.], v. 4, n. 2, p. 49–60, 2019. DOI: 10.14254/jems.2019.4-2.5. Disponível em: https://jems.sciview.net/index.php/jems/article/view/80. Acesso em: 7 jul. 2026.