Budiarto Heru, M. N. Matondang, & Yossa. (2018). A Correlation between Environmental Knowledge and High School Student Coral Reefs Concervation’s Concern at Kepulauan Seribu. Biosfer: Jurnal Pendidikan Biologi, 8(2), 9–13. https://doi.org/10.21009/biosferjpb.8-2.2