Ina Saparlina, and Iman Nurjaman. “The Effect of Student Learning Outcomes Using A Tutorial Model With A Group Investigation (GI) Type Cooperative Model On The Ecosystem Concept In State High School”. Elementaria: Journal of Educational Research, vol. 1, no. 2, Dec. 2023, pp. 77-88, doi:10.61166/elm.v1i2.36.