Hafni, Fauziah, et al. “Development of E-Module of Fluid Physics Based on Problem-Based Learning (PBL) to Improve Motivation and Learning Outcomes of Grade XI Students of SMAN 4 Bagan Sinembah”. Journal of Educational Sciences, vol. 9, no. 4, July 2025, pp. 1814-30, https://doi.org/10.31258/jes.9.4.p.1814-1830.