Afriliandini F, Nugrahalia M. The Implementation of Group Investigation Model on Learning Outcome at The Topic Ecosystem Class X In SMA Negeri 11 Medan Academic Year 2014/2015. JPP [Internet]. 2016 Aug. 4 [cited 2026 Jan. 23];3(4). Available from: https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/3989