Gaya APA

Williams, B, K., O`LEARY, T. (1989). COMPUTERS AND INFORMATION SYSTEM (2nd Edition). California: THE BENJAMIN/CUMMINGS PUBLISHING COMPANY, INC..

Gaya MLA

Williams, Brian, K.., O`LEARY, T.J.. "COMPUTERS AND INFORMATION SYSTEM". 2nd Edition California: THE BENJAMIN/CUMMINGS PUBLISHING COMPANY, INC., 1989. Textbook.