Afriza, Dedy Afriza, and Nanda Eska Anugrah Nasution. 2022. “Comparison of The Learning Outcomes of Junior High School Students Utilizing Audio-Visual and Chart Learning Media to Study Ecosystem”. META: Journal of Science and Technological Education 1 (1):46-57. https://meta.amiin.or.id/index.php/meta/article/view/4.