Supriyatin, Supriyatin, Nurnawati Nurnawati, and Erna Heryanti. “PENGARUH PENERAPAN ACTIVE, JOYFUL, AND EFFECTIVE LEARNING (AJEL) PADA MATERI PERUBAHAN LINGKUNGAN TERHADAP SIKAP PEDULI LINGKUNGAN SISWA”. Biosfer: Jurnal Pendidikan Biologi 9, no. 2 (January 16, 2018): 69-75. Accessed December 14, 2025. http://103.8.12.212:33180/unj/index.php/biosfer/article/view/5571.