Cahya, M., 		Prafitasari, A., 		Somad, M., & 		Usman, A.
(2023).
 Improving Mutual Cooperation and Students' Cognitive Learning Outcomes using Problem Based Learning Assisted by Student Worksheets in Biology Learning.
<em>BIOEDUKASI, 21</em>(2), 74-80.
doi:10.19184/bioedu.v21i2.39352