Sabaruddin Chaniago, Widy Hastuty HS, Nirmalasari, and Minasari Nasution. 2020. “The Influence of Transformational Leadershipof Principals and Teacher Achievement Motivation on Teacher Teaching Performance At SMA Dirgantara Center ”. International Journal of Science, Technology & Management 1 (4), 346-40. https://doi.org/10.46729/ijstm.v1i4.88.