Budiarto Heru, M. N. Matondang and 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), pp. 9–13. doi: 10.21009/biosferjpb.8-2.2.