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Harahap, F.A., Hutasuhut, S. and Thamrin, T. 2023. Development of Flip Book-Based Economics Teaching Materials To Improve The Economic Learning Outcomes of Students In Class Xi Man 2 Deli Serdang In Academic Year 2021/2022. Journal Research of Social Science, Economics, and Management. 2, 6 (Jan. 2023), 938–956. DOI:https://doi.org/10.59141/jrssem.v2i06.356.