xii DAFTAR GAMBAR Gambar 2.1. QR Code Google Scholar Gambar 2.2. QR Code Directory of Open Access Journals Gambar 2.3. QR Code Garuda Ristekdikti Gambar 2.4. QR Code Taylor & Francis Open Access Journals Gambar 2.5. QR Code Elsevier Open Access Journals 7 7 8 9 9
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