Zaini, Z. H. and Mansor, M. (2021) “The Influence of the Transformational Leadership of the Headmasters on the Professional Development of Preschool Teachers”, Jurnal Manajemen Pendidikan : Jurnal Ilmiah Administrasi, Manajemen dan Kepemimpinan Pendidikan, 3(1), pp. 56–74. doi: 10.21831/jump.v3i1.34850.