Pertiwi, A. Y., Sri Mulyani Endang Susilowati, S. M. E. S., & Khumaedi, K. (2019). Learning Motivation and Students’ Critical Thinking Ability in Science Learning through a Problem Based Learning Model Assisted by Video Media. Journal of Primary Education, 8(7), 64-74. https://doi.org/10.15294/jpe.v10i1.34028