O'Leary, D. E. (2000). Enterprise resource planning systems: Systems, life cycle, electronic commerce, and risk. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)O'Leary, Daniel Edmund. Enterprise Resource Planning Systems: Systems, Life Cycle, Electronic Commerce, and Risk. Cambridge, [Eng.]: Cambridge University Press, 2000.
Lua MLA (9ú heag.)O'Leary, Daniel Edmund. Enterprise Resource Planning Systems: Systems, Life Cycle, Electronic Commerce, and Risk. Cambridge University Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.