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. J.Gen.Educ.Humanit. [Internet]. 2025 Nov. 6 [cited 2026 May 13];4(4):1949-62. Available from: https://journal-gehu.com/index.php/gehu/article/view/761