Dyfyniad APA

O'Brien, J. A., & Marakas, G. M. (2007). Introduction to information systems (13th ed.). Boston: McGraw-Hill/Irwin.

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.