Tirta GAR, Prabowo P, Kuntjoro S. Development of Physics Teaching Instruments Belong to Cooperative Group Investigation Model to Improve Students Self-Efficacy and Learning Achievement. J. penelitian. pendidik. sains [Internet]. 2018Jun.26 [cited 2024Apr.29];7(2):1464-71. Available from: https://journal.unesa.ac.id/index.php/jpps/article/view/2925