OTHMAN, Afraa. The Role of Self-Esteem in Increasing Tax Revenue in Sudan (Field study on the Tax Office - Red Sea). Ibn Khaldoun Journal for Studies and Researches, فلسطين, v. 1, n. 1, 2023. DOI: 10.56989/benkj.v1i1.531. Disponível em: https://benkjournal.com/index.php/benkj/article/view/531. Acesso em: 22 apr. 2026.