Pramudiani, P. ., A. F. Oktafiani, T. A. . Aziz, and Y. W. . Purnomo. “Enhancing Conceptual Knowledge about Shape through Realistic Mathematics Education”. Jurnal Inovasi Pendidikan Dasar, vol. 3, no. 1, Nov. 2017, pp. 31-38, https://journal.uhamka.ac.id/index.php/jipd/article/view/8631.