Zulfa, M., M. G. Sembiring, dan Y. Yumiati. “The Effect of Puzzle-Based Learning on students’ Mathematical Creative Thinking Ability and Active Learning”. Math Didactic: Jurnal Pendidikan Matematika, Vol. 9, no. 2, Juni 2023, hlm. 278-92, doi:10.33654/math.v9i2.2176.