Zaini, Z. H., & 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), 56–74. https://doi.org/10.21831/jump.v3i1.34850