Atifah, A. and Sari, R.L.P. 2025. The Effect of STEM-Project-based Learning on Self-Efficacy in High School Chemistry Learning. Hydrogen: Jurnal Kependidikan Kimia. 13, 1 (Feb. 2025), 151–161. DOI:https://doi.org/10.33394/hjkk.v13i1.14211.