Lubis RR, Tanjung IF, Adlini MN. Development of Student Worksheets Based on Problem Based Learning on Excretory System Material for Grade XI Senior High School. Bioeduca J. Biol. Educ. [Internet]. 2023 Sep. 29 [cited 2025 Feb. 2];5(2):91-104. Available from: https://journal.walisongo.ac.id/index.php/BIOEDUCA/article/view/16483