Dewi CA, Handayani TF. Validitas Modul Kimia Berbasis Problem Based Research PBR pada Materi Larutan Elektrolit dan Nonelektrolit. J. Prisma. Sains [Internet]. 2015 Dec. 26 [cited 2025 Sep. 29];3(2):54-8. Available from: https://ojspanel.undikma.ac.id/index.php/prismasains/article/view/972