Gaya APA

O'BRIEN, J, A. (1990). MANAGEMENT INFORMATION SYSTEM : A MANAGERIAL END USER PERSPECTIVE . United States of America: RICHARD D.IRWIN, INC..

Gaya MLA

O'BRIEN, JAMES, A.. "MANAGEMENT INFORMATION SYSTEM : A MANAGERIAL END USER PERSPECTIVE". United States of America: RICHARD D.IRWIN, INC., 1990. Text.