Nurmalina, N. and Suhartono, S. 2021. The Effect Of Sustainable Professional Development On The Competence And Performance Of Elementary School Teachers In Learning Innovation. Jurnal Pendidikan Terbuka Dan Jarak Jauh. 22, 2 (Dec. 2021), 64–73. DOI:https://doi.org/10.33830/ptjj.v22i2.3227.2021.