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This work is licensed under a Creative Commons Attribution 4.0 International License.
Roikestina Silaban
Universitas Audi Indonesia, Medan (1)(2)
Indonesia
Universitas Audi Indonesia, Medan (1)(2)
Tulus Januardi Tua Panjaitan
Universitas Audi Indonesia, Medan (1)(2)
Indonesia
Universitas Audi Indonesia, Medan (1)(2)
Faija Sihombing
Universitas Audi Indonesia, Medan (1)(2)
Indonesia
Universitas Audi Indonesia, Medan (1)(2)
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