Dyfyniad APA

O´Brien, J. A., & Marakas, G. M. (2007). Introduction to information systems (13th ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

O´Brien, James A., and George M. Marakas. Introduction to Information Systems. 13th ed. Boston, MA: McGraw-Hill, 2007.

Dyfyniad MLA

O´Brien, James A., and George M. Marakas. Introduction to Information Systems. 13th ed. McGraw-Hill, 2007.

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