The editor-in-chief has retracted this article because it overlaps with an online article in the press by the same authors as the one in the "Retos" journal. Ayu Purnama Wenly did not respond to correspondence from the publisher about this retraction. The publisher was unable to confirm the contact details of Ramdan Pelana, Ayu Purnama Wenly, or Harry Syahputra Nasution.
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