Al-Kayyal, Rua, Erika Varga, és Katalin Szabó. „Transformational Leadership and Employee Motivation in Hungary: The Influence of Age, Educational Attainment and Work Experience”. Acta Carolus Robertus 14, no. Különszám (december 19, 2024): 84–96. Elérés december 5, 2025. https://journal.uni-mate.hu/index.php/acr/article/view/5749.