Harahap KA, Surya E. Application of Cooperative Learning Model With Type of Two Stay Two Stray to Improve Results of Mathematics Teaching. IJSBAR [Internet]. 2017 May 16 [cited 2025 Sep. 17];33(2):156-65. Available from: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/7370