Ratri Ratnasari, D. I., S. Mariani, and M. Mulyono. “Mathematics Creative Thinking Skills Reviewed from the Students’ Self-Confidence by Implementing the Treffinger Learning Model Assisted by Geogebra”. Journal of Primary Education, Vol. 9, no. 4, Sept. 2020, pp. 377-86, doi:10.15294/jpe.v9i4.41059.