Mahmudi, M., and F. S. Siskawati. “Improving Students Activity and Students Learning Outcomes by Using Collaboration of Mind Mapping and Picture and Picture Models”. Jurnal Axioma : Jurnal Matematika Dan Pembelajaran, vol. 3, no. 1, Jan. 2018, pp. 12-27, https://ejurnal.uij.ac.id/index.php/AXI/article/view/306.