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Bakara, Julita, and Arsen Nahum Pasaribu. “THE IMPLEMENTATION OF COOPERATIVE LEARNING BY USING A JIGSAW TECHNIQUE IN SPEAKING TO THE GRADE XI STUDENTS OF SMK NEGERI 9 MEDAN”. Jurnal Ilmiah Aquinas 5, no. 1 (February 4, 2022): 10–23. Accessed April 18, 2025. https://ejournal.ust.ac.id/index.php/Aquinas/article/view/1552.