Suntoro, Ranu, et al. “The Humanistic Learning Theory As a Learning Approach in Overcoming Students Psychological Problems During the Covid19 Pandemic”. ICHELSS: International Conference on Humanities, Education, Law, and Social Sciences, vol. 1, no. 1, July 2021, pp. 137-48, https://journal.unj.ac.id/unj/index.php/hispisi/article/view/22189.