Orwig, G. W. (1983). The computer tutor: Atari home computer edition: learning activities for homes and schools. Little, Brown.
Chicago-viite (17. p.)Orwig, Gary W. The Computer Tutor: Atari Home Computer Edition: Learning Activities for Homes and Schools. Little, Brown, 1983.
MLA-viite (9. p.)Orwig, Gary W. The Computer Tutor: Atari Home Computer Edition: Learning Activities for Homes and Schools. Little, Brown, 1983.
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