Sudihartinih, Eyus, and Tia Purniati. “VISUALIZING PARABOLA: THE STUDY OF A MANIPULATIVE’S EFFECTIVENESS”. JOURNAL of MATHEMATICS SCIENCE and EDUCATION 2, no. 1 (December 31, 2019): 46-59. Accessed July 17, 2024. https://ojs.stkippgri-lubuklinggau.ac.id/index.php/JMSE/article/view/816.