ROBERT MICHEL. (2001). E-STRATEGY PURE AND SIMPLE: CONNECTING YOUR...BUSINESS STRATEGY. MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)ROBERT MICHEL. E-STRATEGY PURE AND SIMPLE: CONNECTING YOUR...BUSINESS STRATEGY. NEW YORK: MCGRAW-HILL, 2001.
Lua MLA (9ú heag.)ROBERT MICHEL. E-STRATEGY PURE AND SIMPLE: CONNECTING YOUR...BUSINESS STRATEGY. MCGRAW-HILL, 2001.
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