HOWARD CAROLINE. (2004). DISTANCE LEARNING AND UNIVERSITY EFFECTIVENESS. INFORMATION SCIENCE.
Chicago-čujuhus (17. p.)HOWARD CAROLINE. DISTANCE LEARNING AND UNIVERSITY EFFECTIVENESS. U S A: INFORMATION SCIENCE, 2004.
MLA-čujuhus (9. p.)HOWARD CAROLINE. DISTANCE LEARNING AND UNIVERSITY EFFECTIVENESS. INFORMATION SCIENCE, 2004.
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