O'BRIEN, J. A. (1996). Management Information Systems: Managing Information Technology In The Internetworked Enterprise James A. O'brien. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)O'BRIEN, James A. Management Information Systems: Managing Information Technology In The Internetworked Enterprise James A. O'brien. McGraw-Hill, 1996.
Lua MLA (8ú heag.)O'BRIEN, James A. Management Information Systems: Managing Information Technology In The Internetworked Enterprise James A. O'brien. McGraw-Hill, 1996.
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