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Widhiatama, Daniel Ari (2016) Designing supplementary reading materials for mid beginner students using schoology. Skripsi thesis, Sanata Dharma University.
Widhiatama, Daniel Ari (2011) A Study on the use of classroom language functions by the biology teacher of SMUN I Sleman Yogyakarta. Skripsi thesis, Sanata Dharma University.