Gaya APA

Williams, B, K., O\'Leary, T, J. (1989). Study guide for computers and information systems . The Benjamin: Cumming Pub .C0.

Gaya MLA

Williams, Brian, K.., O\'Leary, Thimothy, J.. "Study guide for computers and information systems". The Benjamin: Cumming Pub .C0, 1989. Text.