Sinaga, S. R., Sidabutar, H., & Aritonang, E. (2021). DIFFERENCES OF STUDENT LEARNING OUTCOMES AND ABILITY TO DELIVER INFORMATION ON PICTURE AND PICTURE AND INSIDE OUTSIDE CIRCLE LEARNING MODEL ON VIRUSES. Jurnal Pelita Pendidikan, 9(1). https://doi.org/10.24114/jpp.v9i1.21505