Pratimi, R. S. “The Influence of the Implementation of the Self-Directed Learning (SDL) Learning Model Assisted by Blended Learning on the Learning Outcomes of Environmental Chemistry Students”. Jurnal Riset Ilmu Pendidikan, vol. 4, no. 3, Sept. 2024, pp. 124-31, doi:10.56495/jrip.v4i3.864.