Sriyanti, I., & Yaniawati, R. (2017). PENINGKATAN KEMAMPUAN PEMAHAMAN MATEMATIKA SISWA SMP PGRI PAMANUKAN MELALUI MODEL PEMBELAJARAN KOOPERATIF TIPE STAD. Symmetry: Pasundan Journal Of Research In Mathematics Learning And Education, 2(2), 31-38. doi:10.23969/symmetry.v2i2.567