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Burhan, Nurlina and Mulbar, Usman and M, Muhammad Darwis (2018) THE INFLUENCE OF MASTERING CELLULAR PHONE AND LAPTOP USAGE OF SPATIAL ABILITY OF MATHEMATICS AND GEOMETRY LEARNING ACHIEVEMENT OF UNDERGRADUATE STUDENTS OF MATHEMATICS EDUCATION STUDY PROGRAM IN UNIVERSITAS NEGERI MAKASSAR. Diploma thesis, UNIVERSITAS NEGERI MAKASSAR.