Saputri, A. E. (2021). The DEVELOPMENT PRINCIPLE OF A CONTEXTUAL BASED TEACHING BOOK ON ENVIRONMENTAL EDUCATION FOR PRIMARY SCHOOL TEACHERS. Jurnal Ilmiah Pendidikan Lingkungan Dan Pembangunan, 22(01), 43 - 49. Retrieved from https://journal.unj.ac.id/unj/index.php/plpb/article/view/16966