Hariyanto, Hariyanto, Candra Wijaya, Yahfizham Y Yahfizham, and Muhammad Fuad Zaini. 2021. “Principal Interpersonal Communication in Decision Making And Policy Quality Improvement of MTs Ummi Lubuk Pakam”. International Journal of Educational Research &Amp; Social Sciences 2 (1):77-85. https://doi.org/10.51601/ijersc.v2i1.10.