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Nurman Ginting
Universitas Muhammadiyah Sumatera Utara
Indonesia
Riyan Pradesyah
Universitas Muhammadiyah Sumatera Utara
Indonesia
Amini Amini
Universitas Muhammadiyah Sumatera Utara
Indonesia
Hadi Sahputra Panggabean
Universitas Panca Budi
Indonesia
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