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Kirana, Emmelia Dyah and Angelina, Patricia (2018) Applying positive reinforcement to increase students’ motivation in learning English for grade VII in SMP Pangudi Luhur 1 Yogyakarta. English Language Teaching and Research Journal, 2 (1). pp. 9-24. ISSN 2579-8235
Kirana, Emmelia Dyah (2018) Applying positive reinforcement to increase students` motivation for Grade VII in SMP Pangudi Luhur 1 Yogyakarta. Skripsi thesis, Sanata Dharma University.