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Rumjati, Widuri Gito (2006) Designing a set of instructional speaking materials for the extracurricular activities based on the principles of cooperative learning for the secound year students of SMAN 1 Godean-Sleman, Yogyakarta. Skripsi thesis, Sanata Dharma University.
Rumjati, Widuri Gito (2006) Designing a set of instructional speaking materials for the extracurricular activities based on the principles of cooperative learning for the secound year students of SMAN 1 Godean-Sleman, Yogyakarta. Skripsi thesis, Sanata Dharma University.