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Marbun, Lova Tiomanna Br (2019) The implementation of classroom procedure to improve students' discipline in grade IX in one of the Christian Schools in Tangerang = Penerapan prosedur kelas untuk meningkatkan kedisiplinan siswa kelas IX di salah satu Sekolah Kristen di Tangerang. Bachelor thesis, Universitas Pelita Harapan.