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L

Laila, Khairani, Asahan University (Indonesia)
Lesmana, Gusman, Muhammadiyah University of North Sumatra (Indonesia)
Lestari P, Oktavia, University Of Muhammadiyah Sumatera Utara (Indonesia)
Lumban Gaol, Hirim Sarimauli, University of Medan (Indonesia)

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