Sintya Kinanti Putri, and Aman Simare-Mare. 2026. “THE ROLE OF PRINCIPAL LEADERSHIP IN IMPROVING LEARNING EFFECTIVENESS IN KINDERGARTEN IN TANJUNG MORAWA DISTRICT”. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) 5 (9):5809-36. https://doi.org/10.5281/zenodo.22907636.