FRENZEL CARROLL W; FRENZEL JOHN C. (2011). MANAGEMENT OF INFORMATION TECHNOLOGY (4TH.). CENGAGE LEARNING.
Lua i Stíl Chicago (17ú heag.)FRENZEL CARROLL W; FRENZEL JOHN C. MANAGEMENT OF INFORMATION TECHNOLOGY. 4TH. NEW DELHI: CENGAGE LEARNING, 2011.
Lua MLA (9ú heag.)FRENZEL CARROLL W; FRENZEL JOHN C. MANAGEMENT OF INFORMATION TECHNOLOGY. 4TH. CENGAGE LEARNING, 2011.
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