O'BRIEN JAMES A. (1991). MANAGEMENT INFORMATION SYSTEMS: A MANAGERIAL & USER PERSPECTIVE. GALGOTIA PUBLICATIONS.
Chicago-viite (17. p.)O'BRIEN JAMES A. MANAGEMENT INFORMATION SYSTEMS: A MANAGERIAL & USER PERSPECTIVE. NEW DELHI: GALGOTIA PUBLICATIONS, 1991.
MLA-viite (9. p.)O'BRIEN JAMES A. MANAGEMENT INFORMATION SYSTEMS: A MANAGERIAL & USER PERSPECTIVE. GALGOTIA PUBLICATIONS, 1991.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.