LEON, A. (1999). FUNDAMENTALS OF INFORMATION TECHNOLOGY. LEON TECH WORLD.
Chicago-čujuhus (17. p.)LEON, ALEXIS. FUNDAMENTALS OF INFORMATION TECHNOLOGY. ONG: LEON TECH WORLD, 1999.
MLA-čujuhus (9. p.)LEON, ALEXIS. FUNDAMENTALS OF INFORMATION TECHNOLOGY. LEON TECH WORLD, 1999.
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