Liana, Liana, et al. “The Influence of the Problem-Based Learning Model Assisted by PhET Simulations on Students’ Problem-Solving Abilities and Mastery of Physics Concepts ”. AMPLITUDO : Journal of Science and Technology Innovation, vol. 2, no. 2, Aug. 2023, pp. 101-7, doi:10.56566/amplitudo.v2i2.103.