Gultom S. The Effect of Problem Based Learning Strategic and Divergent Thinking Style on The Ability to Solve Environmental The Problems (an Experimental Study at SMP Negeri 161 Jakarta, 2015). IJEEM [Internet]. 2017 Jul. 31 [cited 2024 Nov. 22];1(2):66-82. Available from: https://journal.unj.ac.id/unj/index.php/ijeem/article/view/3701