Usman, Ali, Kukuh Munandar, and Agus Prasetyo Utomo. “How Can PBL Promote Critical Thinking Skills in Biology Material? A Systematic Literature Review in Reputable Journals”. Research and Development in Education (RaDEn) 4, no. 1 (May 28, 2024): 450–464. Accessed June 30, 2024. https://ejournal.umm.ac.id/index.php/raden/article/view/32401.