Nurfazliana, Nurfazliana, and Jumadi Jumadi. “Development of E-Module PBL Model Learning to Improve Students’ Mastery of Concepts”. Jurnal Penelitian Pendidikan IPA, vol. 9, no. 5, May 2023, pp. 2638-46, doi:10.29303/jppipa.v9i5.3506.