SUMIYATI, Sri. OPERATIONAL FIELD TESTING BAHAN PEMBELAJARAN GENERASI BARU (Studi pada Matakuliah Geografi dan Pelestarian Lingkungan dalam PIPS Universitas Terbuka). JURNAL ILMIAH EDUNOMIKA, [S. l.], v. 6, n. 2, p. 637–645, 2022. DOI: 10.29040/jie.v6i2.4850. Disponível em: https://www.jurnal.stie-aas.ac.id/index.php/jie/article/view/4850. Acesso em: 28 sep. 2025.