E-COMMERCE EFFECT AND VALUE ADDED TAX (VAT) POLICY ON CONSUMER BEHAVIOR: (Study at the Faculty of Economics and Business, Muslim University of Indonesia). JOSAR (Journal of Students Academic Research), [S. l.], v. 5, n. 1, p. 85–93, 2020. DOI: 10.35457/josar.v5i1.1117. Disponível em: https://ejournal.unisbablitar.ac.id/index.php/josar/article/view/1117. Acesso em: 11 dec. 2025.