WAHAB, N. A.; ZAINOL, Z.; BAKAR, M. A.; IBRAHIM, A. Z.; MINHAJ, N. Developing Service Quality Index for Zakat Institutions. International Journal of Economics and Financial Issues, [S. l.], v. 6, n. 7S, p. 249–258, 2016. Disponível em: https://www.econjournals.com/index.php/ijefi/article/view/3616. Acesso em: 26 apr. 2024.