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Sumardyono, Sumardyono and Hidayah, Nurul and Errika, Astina Dwi and Gunardi, Gunardi and Pujianto, Widarso and Harahap, Suryani (2018) EDUMAT: Jurnal Edukasi Matematika Vol. 9 No. 17 November 2018. EDUMAT, 9 (17). Direktorat Jenderal Guru dan Tenaga Kependidikan, Sleman, pp. 988-1048.
