Siskawati, Fury Styo. 2017. “Study Comparison of Learning Outcomes Between the User and Non User LEKER GABEL With Hotpotatos in Islamic University Of Jember”. Jurnal Axioma : Jurnal Matematika Dan Pembelajaran 2 (2):133-42. https://ejurnal.uij.ac.id/index.php/AXI/article/view/296.