Cita APA (7th ed.)
O'Leary, D. E. Enterprise resource planning systems: Systems, life cycle, electronic commerce, and risk. Cambridge University.
Cita Chicago (17th ed.)
O'Leary, Daniel E. Enterprise Resource Planning Systems: Systems, Life Cycle, Electronic Commerce, and Risk. Cambridge, Inglaterra: Cambridge University.
Cita MLA (9th ed.)
O'Leary, Daniel E. Enterprise Resource Planning Systems: Systems, Life Cycle, Electronic Commerce, and Risk. Cambridge University.
Atenció: Aquestes cites poden no estar 100% correctes.