Yusnaeni, Y, Angela G Lika, and Sriarmila Hiul. “Human Respiratory System: Designing Student Worksheet Based on Inquiry to Promote 21st-Century Skills”. Biosfer: Jurnal Pendidikan Biologi 12, no. 1 (April 28, 2019): 34 - 44. Accessed February 28, 2026. http://103.8.12.212:33180/unj/index.php/biosfer/article/view/10235.