Hulyadi H, Bayani F, Muhali M, Khery Y, Gargazi G. Correlation Profile of Cognition Levels and Student Ability to Solve Problems in Biodiesel Synthesis. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2023 Jun. 25 [cited 2024 Jul. 23];9(6):4179-88. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/3130