Zaini, H. Muhammad, and Retno Jumirah. “DEVELOPING ECOLOGY LEARNING OBJECT MATERIALS FOR IMPROVING STUDENTS CRITICAL THINKING SKILLS OF MADRASAH ALIYAH”. JPBI (Jurnal Pendidikan Biologi Indonesia) 2, no. 1 (July 22, 2016): 39–47. Accessed June 7, 2026. https://ejournal.umm.ac.id/index.php/jpbi/article/view/3370.