APA-viite (7. p.)
O'Brien, J. A. (2003). Introduction to information systems: Essentials for the E-business enterprise (11th ed.). McGraw-Hill/Irwin.
Chicago-viite (17. p.)
O'Brien, James A. Introduction to Information Systems: Essentials for the E-business Enterprise. 11th ed. Boston: McGraw-Hill/Irwin, 2003.
MLA-viite (9. p.)
O'Brien, James A. Introduction to Information Systems: Essentials for the E-business Enterprise. 11th ed. McGraw-Hill/Irwin, 2003.
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