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Sari Adelina Y, Neneng Sri Lestari, Suprayetno E. Analysis Students Addition Error in Writing Thesis Abstract Of English Education Department STKIP AL Maksum Langkat. PENDIDIK [Internet]. 2022 Dec. 10 [cited 2024 Jun. 19];7(2):167-72. Available from: http://e-journal.sari-mutiara.ac.id/index.php/JMT/article/view/3476