Mursidik, E. s M. et al. 2015. Kemampuan Berpikir Kreatif Dalam Memecahkan Masalah Matetatika Open-Ended Ditinjau Dari Tingkat Kemampuan Matematika Siswa Sekolah Dasar.: Creative Thinking Ability in Solving Open-Ended Mathematical Problems Judging from the Mathematics Ability Level of Elementary School Students. Pedagogia : Jurnal Pendidikan. 4, 1 (Feb. 2015), 23–33. DOI:https://doi.org/10.21070/pedagogia.v4i1.69.