Ismathulhuda, Azla, et al. “Validity and Practicality of Project-Based E-Student Worksheet on Thermochemical Materials to Improve Learning Outcomes ”. Jurnal Penelitian Pendidikan IPA, vol. 8, no. 3, July 2022, pp. 1433-41, doi:10.29303/jppipa.v8i3.1691.