S. N. . Adilah and N. . Efendi, “The Effect of Guided Discovery Learning Model on the Science Process Skills of Students in State VII Bangil Middle School Class VII on Environmental Pollution Materials: Pengaruh Model Guided Discovery Learning terhadap Keterampilan Proses Sains Siswa di SMP Negeri 3 Bangil Kelas VII pada Materi Pencemaran Lingkungan”, icecrs, vol. 8, Jul. 2020.