[1]
Bustanika, L.H. and Suparman 2019. Design of pop up book based on realistic mathematics education to improving spatial ability students of class VIII.
Jurnal Pendidikan Bitara UPSI. 12, 1 (Oct. 2019), 1–9. DOI:
https://doi.org/10.37134/bitara.vol12.1.2019.