NIYITEGEKA, Eric Eliel; HESBON, Opiyo Andala. Effects of Collaborative Leadership on Teacher Professional Development in Public Secondary Schools in Nyagatare District, Rwanda. International Journal of Management and Development Studies, [S. l.], v. 15, n. 6, p. 109–120, 2026. DOI: 10.53983/ijmds.v15n06.012. Disponível em: https://www.ijmds.in/index.php/IJMDS/article/view/92. Acesso em: 25 jun. 2026.