Joni, Yohana Melci, et al. “APPLICATION OF PROBLEM-BASED LEARNING (PBL) LEARNING MODEL ON CLASS VIII STUDENT’S CRITICAL THINKING ABILITY STATE JUNIOR HIGH SCHOOL 6 BORONG”. ScienceEdu, vol. 4, no. 2, Dec. 2021, pp. 89-92, doi:10.19184/se.v4i2.27772.