Nawipa, Yomance, and Lidya Kristina Tualena. “PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL) TERHADAP HASIL BELAJAR KOGNITIF PESERTA DIDIK”. Arfak Chem: Chemistry Education Journal, vol. 3, no. 1, May 2020, pp. 186-92, doi:10.30862/accej.v3i1.295.