Musa, Khalip, et al. “KEPIMPINAN TRANSFORMASIONAL PENGETUA: PERBANDINGAN ANTARA SEKOLAH MENENGAH AWAM DAN SWASTA CEMERLANG: PRINCIPALS’ TRANSFORMATIONAL LEADERSHIP:COMPARISON BETWEEN EXCELLENCE PUBLIC AND PRIVATE SCHOOLS”. Management Research Journal, vol. 3, Oct. 2014, pp. 120-39, https://ejournal.upsi.edu.my/index.php/MRJ/article/view/1517.