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Rahman Pakpahan, Vicky Aulia, Universitas Muhammadiyah Sumatera Utara (Indonesia)
Ramadhani, Rahmat, Universitas Muhammadiyah Sumatera Utara (Indonesia)
Randu, Zaura, Universitas Muhammadiyah Sumatera Utara (Indonesia)
Ritonga, Arifin Said, University Of Muhammadiyah Sumatera Utara (Indonesia)
Rosy, Deuis Rina, Universitas Sumatera Utara (Indonesia)

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