Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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