Muhamad Sabirin, Aminah, S. ., Muhniansyah, & Muh. Fajaruddin Atsnan. (2021). Students’ Skills Performing Mathematical Reasoning and Communication through Group Investigation Learning Model. Jurnal Pengembangan Pembelajaran Matematika, 3(2), 112–128. https://doi.org/10.14421/jppm.2021.32.112-128