Madawistama, S. T.; Heryani , Y. .; Kurniawan, D. . Three Zone Learning Concepts to Improve Mathematical Proof of Probability Theory. J. Math Educ. Nusant. Wahana Publ. Karya Tulis Ilm. di Bid. Pendidik. Mat. 2022, 8 (1), 27-38. https://doi.org/10.29407/jmen.v8i1.17004.