LEON, A. (1999). FUNDAMENTALS OF INFORMATION TECHNOLOGY. LEON TECH WORLD.
Lua i Stíl Chicago (17ú heag.)LEON, ALEXIS. FUNDAMENTALS OF INFORMATION TECHNOLOGY. ONG: LEON TECH WORLD, 1999.
Lua MLA (9ú heag.)LEON, ALEXIS. FUNDAMENTALS OF INFORMATION TECHNOLOGY. LEON TECH WORLD, 1999.
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