Roy Barli Sihombing, Etin Solihatin and Ajat Sudrajat 2018. The Effect of Cooperative Learning Models and Self Efficacy to Critical Thinking Ability on Social Studies. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE. 4, 7 (Jul. 2018), 89–96. DOI:https://doi.org/10.31695/IJASRE.2018.32796.