Dwi Cahyani M, Gusman TA. Desain dan Uji Validitas e-Modul Perkuliahan Kimia Fisika Berbasis Problem Based Learning. OJPK [Internet]. 2023 Jun. 28 [cited 2025 Mar. 31];7(1):117-25. Available from: https://jurnal.radenfatah.ac.id/index.php/orbital/article/view/17499