dahlan, Taufiqulloh, Moh. Nurhadi, & Siti Maryam Rohimah. " PENGARUH PENDEKATAN OPEN-ENDED TERHADAP KEMAMPUAN BERPIKIR KREATIF MATEMATIS MAHASISWA PGSD." Symmetry: Pasundan Journal of Research in Mathematics Learning and Education [Online], 2.1 (2017): 53-66. Web. 30 Nov. 2020