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. Jurnal Pelita Pendidikan [Internet]. 4 Agustus 2016 [dikutip 3 Juli 2025];3(4). Tersedia pada: https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/3989