McKeen, J. D. IT Strategy: Pearson New International Edition (2.). Pearson Education UK.
Lua i Stíl Chicago (17ú heag.)McKeen, James D;Smith. IT Strategy: Pearson New International Edition. 2. Pearson Education UK.
Lua MLA (8ú heag.)McKeen, James D;Smith. IT Strategy: Pearson New International Edition. 2. Pearson Education UK.
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