Dyfyniad APA

O'Brien, J. A. (2005). Introduction to information systems (12th ed.). McGraw-Hill/Irwin.

Dyfyniad Arddull Chicago

O'Brien, James A. Introduction to Information Systems. 12th ed. Boston: McGraw-Hill/Irwin, 2005.

Dyfyniad MLA

O'Brien, James A. Introduction to Information Systems. 12th ed. McGraw-Hill/Irwin, 2005.

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