Yerimadesi, Y., Jalius, E. and Aini, F. 2020. Improvement of Teacher Professionalism through Classroom Action Research Training in MGMP Kimia SMA/ MA Kabupaten Tanah Datar. Pelita Eksakta. 3, 2 (Nov. 2020), 136-141. DOI:https://doi.org/10.24036/pelitaeksakta/vol3-iss2/98.