Nasution, Fadhilah Syam, and Edy Surya. 2017. “Efforts to Increase Student Learning Results With Cooperative Learning Type Learning Model Think Pair Share on the Cube and Beams Materials in Class VIII SMP Kartika I-1 Medan”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 33 (3):280-90. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7466.