[1]
Harahap, L.J., Komala, R. and Ristanto, .R.H. 2020. Studying Ecosystem in Senior High School: The Utilization of CirGi Learning Model to Enhance Mastery of Biological Concepts. Indonesian Research Journal in Education |IRJE|. 4, 2 (Nov. 2020), 515-529. DOI:https://doi.org/10.22437/irje.v4i2.9608.