Erti, M. T. “Peningkatan Kemampuan Guru Dalam Melaksanakan Problem Based Learning Melalui Supervisi Akademik Di Sekolah”. Indonesian Journal of Instructional Media and Model, vol. 2, no. 1, May 2020, pp. 51-58, https://journal.univetbantara.ac.id/index.php/ijimm/article/view/736.