M. Alang Khairun Nizar 2022. IMPLEMENTATION OF HEAD OF MADRASAH LEADERSHIP IN AN ATTEMPT IMPROVING PROFESSIONALISM TEACHER AT MADRASAH TSANAWIYAH NEGERI TEBING TINGGI CITY. International Journal of Educational Research Excellence. 1, 2 (Dec. 2022), 213–219. DOI:https://doi.org/10.55299/ijere.v1i2.314.