Apolonia Hendrice Ramda, Melania Delima, & Fransiskus Nendi. (2022). THE IMPACT OF PBL WITH PEER TUTORS ON THE PROBLEM SOLVING ABILITY OF MIDDLE SCHOOL STUDENTS. Jurnal Pendidikan Dan Kebudayaan Missio, 14(2), 190-203. https://doi.org/10.36928/jpkm.v14i2.1283