Miratika, ., . Asmin, . Mulyono, and A. Minarni. “The Effect Of Cooperative Learning of Type Think Pair Share Based on Mandailing Culture To Mathematical Problem Solving Ability Of The Students at Middle Secondary School Ali Imron Medan”. Advances in Social Sciences Research Journal, vol. 5, no. 10, Oct. 2018, doi:10.14738/assrj.510.5239.