AL-OMARI, Rami Mahmoud Daifallah. Duplication of leadership and management and the difference between them. Journal of Educational and Psychological Sciences, New Mexico, United States, v. 3, n. 19, p. 141–130, 2019. DOI: 10.26389/AJSRP.R230119. Disponível em: https://journals.ajsrp.com/index.php/jeps/article/view/1634. Acesso em: 24 jan. 2026.