Nasution, Nasir, Muslim Marpaung, y Amirulsyah Amirulsyah. «The Influence of Spiritual Leadership, Work Life Quality, Islamic Work Ethic on Employee Performance With Organizational Citizenship Behavior.». Opción 350 (agosto 3, 2019): 962-994. Accedido julio 12, 2025. https://mail.produccioncientificaluz.org/index.php/opcion/article/view/31924.