Madawistama, Sri Tirto, Yeni Heryani, and Dian Kurniawan. 2022. “Three Zone Learning Concepts to Improve Mathematical Proof of Probability Theory”. Jurnal Math Educator Nusantara: Wahana Publikasi Karya Tulis Ilmiah Di Bidang Pendidikan Matematika 8 (1):27-38. https://doi.org/10.29407/jmen.v8i1.17004.