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Ernita Sibuea
Pascasarjana Universitas Muhammadiyah Sumatera Utara
Indonesia
Elfrianto Elfrianto
Universitas Muhammadiyah Sumatera Utara
Indonesia
Emilda Sulasmi
Universitas Muhammadiyah Sumatera Utara
Indonesia
Parulian Sibuea
Indonesia