., Pujianto, and Janelle L. Juneau. “IMPLEMENTATION OF PROBLEM-BASED INSTRUCTION LEARNING MODEL USING MEDIA KOTAK DAN KARTU MISTERI TO IMPROVE STUDENT LEARNING OUTCOMES”. JURNAL HANDAYANI PGSD FIP UNIMED, vol. 7, no. 2, Aug. 2017, pp. 137-41, doi:10.24114/jh.v7i2.7245.