Apriyanto, Ade, Muhammad Sholeh, and Wawan Setiawardani. “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 4, no. 4 (November 6, 2025): 1949–1962. Accessed May 13, 2026. https://journal-gehu.com/index.php/gehu/article/view/761.