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Hapsari, Prima Dona (2006) A narrative study on the development of english instructional software: a third-grade junior high school case. Skripsi thesis, Sanata Dharma University.
Hapsari, Prima Dona (2002) Designing a set of instructional materials to teach english grammar through games to the sixth grade students of the elementary school. Skripsi thesis, Sanata Dharma University.