Wijayanto CR, Sutrisno S, Mushafanah Q. Keefektifan Model Group Investigation Materi Keliling dan Luas Bangun Datar Terhadap Hasil Belajar. JP2 [Internet]. 2019 Jun. 26 [cited 2024 May 4];2(2):211-22. Available from: https://ejournal.undiksha.ac.id/index.php/JP2/article/view/17911