D. Sartika, J. Warlizasusi, S. Mustar, and E. Purwandari, “THE INFLUENCE OF PRINCIPAL LEADERSHIP AND WORK MOTIVATION ON TEACHER PROFESSIONALISM AT MADRASAH ALIYAH ULUL ALBAB LUBUKLINGGAU”, Leadership, vol. 4, no. 2, pp. 155–166, Jul. 2023.