Latumakulita, I.I. et al. 2023. WhatsApp-Assisted JCL-Based Physics E-Book: Its Effect on Physics Learning Outcome in Senior High School . Jurnal Penelitian Pendidikan IPA. 9, 4 (Apr. 2023), 1846–1853. DOI:https://doi.org/10.29303/jppipa.v9i4.1871.