APRIYANTO, A.; SHOLEH, M.; SETIAWARDANI, W. Management of Teacher Discipline Development Through a Web-Based QR Code Attendance System with WhatsApp E-Notifications at SMK (Vocational School) Nahdlatul Ulama (NU) Kaplongan Indramayu. Journal of General Education and Humanities, Bandung, Indonesia, v. 4, n. 4, p. 1949–1962, 2025. DOI: 10.58421/gehu.v4i4.761. Disponível em: https://journal-gehu.com/index.php/gehu/article/view/761. Acesso em: 13 may. 2026.