sari, riska novia and yusnita, yessy 2018. Praktikalitas dan Efektivitas Modul Logika Matematika Berbasis Problem Based Learning (PBL). Edumatica : Jurnal Pendidikan Matematika. 8, 2 (Nov. 2018), 35-44. DOI:https://doi.org/10.22437/edumatica.v8i2.5540.