Ichsan, Nurmila, dkk. “DEVELOPMENT OF ELECTRONIC TEACHING MATERIALS BASED ON ENRICHED VIRTUAL MODEL ON HUMAN RESPIRATORY SYSTEM MATERIALS TO IMPROVE STUDENT’S COGNITIVE ABILITY”. Jurnal Pelita Pendidikan, vol. 10, no. 2, Agustus 2022, doi:10.24114/jpp.v10i2.34667.