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Mahyudin, Ritonga and Suci, Rahmadhanti Febriani and Martin, Kustati and Ehsan, Khaef and Apri, Wardana Ritonga and Renti, Yasmar (2023) Duolingo: An Arabic Speaking Skills’ Learning Platform for Andragogy Education (Cek Similarity). Hidawi : Education Research International, Amerika Serikat.