Pamungkas, Sekar, Fatchur Rohman, Mimien Henie Irawati Al Muhdhar, and Vivi Novianti. “Developing and Validating a Project-Based Environmental Education (PjBEE) Model to Enhance Sustainability Competencies ”. Biosfer: Jurnal Pendidikan Biologi 19, no. 1 (February 21, 2026): 192–218. Accessed May 27, 2026. https://journal.unj.ac.id/unj/index.php/biosfer/article/view/60468.