Evaluation of customer satisfaction and service quality using SERVQUAL model: the case of fast-food restaurants in Iraq. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 1, p. 336–345, 2021. DOI: 10.21533/pen.v9.i1.736. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/736. Acesso em: 18 oct. 2026.