Lua APA (7ú heag.)

O'Brien, J. A. (2003). Introduction to information systems (11th ed.). McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

O'Brien, James A. Introduction to Information Systems. 11th ed. Boston: McGraw-Hill, 2003.

Lua MLA (9ú heag.)

O'Brien, James A. Introduction to Information Systems. 11th ed. McGraw-Hill, 2003.

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