Gustiyan DA, Kuswono K. PENGARUH MODEL COOPERATIVE LEARNING TIPE BEACH BALL TERHADAP KEMAMPUAN MENGANALISIS SEJARAH. SD [Internet]. 2017 Dec. 29 [cited 2026 Nov. 11];1(3). Available from: https://ojs.ummetro.ac.id/index.php/swarnadwipa/article/view/616