Kurniawati, Eriska Fitri, et al. “USE OF STATISTICS IN RESEARCH OF MATHEMATICAL EDUCATION STUDENTS”. Jurnal Teladan: Jurnal Ilmu Pendidikan Dan Pembelajaran, vol. 3, no. 2, Dec. 2018, pp. 149-55, http://journal.unirow.ac.id/index.php/teladan/article/view/43.