Mangsinco, Kadin. “INSTRUCTIONAL LEADERSHIP AND ITS IMPACT ON TEACHER PROFESSIONAL DEVELOPMENT”. Excellencia: International Multi-disciplinary Journal of Education (2994-9521) 1, no. 2 (December 17, 2024): 291–300. Accessed October 28, 2025. https://multijournals.org/index.php/excellencia-imje/article/view/2014.