Alim, J. A., Hermita, N., Alim, M. L., Wijaya, T. T., & Pereira, J. (2021). Developing a math textbook using realistic mathematics education approach to increase elementary students’ learning motivation. Jurnal Prima Edukasia, 9(2), 193–201. https://doi.org/10.21831/jpe.v9i2.39393