MAHMOOD, A. J. . The Role of Etiquette in Improving Employee Social Behavior : Questionnaire of Employees at Sulaimani International Airport. The Scientific Journal of Cihan University– Sulaimaniya, [S. l.], v. 5, n. 2, p. 67-85, 2022. DOI: 10.25098/5.2.4. Disponível em: https://journal.sulicihan.edu.krd/index.php/sjcus/article/view/75. Acesso em: 12 feb. 2026.