Frisilla, Sonya, and Hardeli Hardeli. 2022. “Validity and Practicality of Chemical Equilibrium Electronic Student Worksheets Based on Guided Discovery Learning to Increase the Critical Thinking Ability”. Jurnal Penelitian Pendidikan IPA 8 (3):1191-98. https://doi.org/10.29303/jppipa.v8i3.1481.