Vivi Rahmadani Siregar — Universitas Sumatera Utara | Morademia

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Data from OpenAlex, ORCID, and Crossref. Statements are evidence, not verdicts. Flag images: Twemoji, CC BY 4.0. Contact: [email protected]

Vivi Rahmadani Siregar — Universitas Sumatera Utara | Morademia