Dagan, D. Upaya Meningkatkan Disiplin Guru Melalui Sistem Reward And Funishment Guna Menunjang Efektivitas Proses Belajar Mengajar Di SD Negeri Tumbang Kalemei: Efforts to Improve Teacher Discipline through a Reward and Funishment System to Support the Effectiveness of the Teaching and Learning Process at SD Negeri Tumbang Kalemei. Tunas J Pendidikan Guru Sekolah Dasar 2020, 6, 1-7.