Gaya APA
WILLIAMS, B, K., O`LEARY, T. (1989).
COMPUTERS AND INFORMATION SYSTEM (Second Edition).
California:
THE BENJAMIN/CUMMINGS.
Gaya MLA
WILLIAMS, Brian, K.., O`LEARY, T.J..
"COMPUTERS AND INFORMATION SYSTEM".
Second Edition
California:
THE BENJAMIN/CUMMINGS,
1989.
Textbook.