Gaya APA
O'Leary, T, J., Williams, B, K. (1989).
Computers And Information Systems (2).
California:
The Benjamin/Cummings Publishing Company.
Gaya MLA
O'Leary, Timothy, J.., Williams, Brian, K..
"Computers And Information Systems".
2
California:
The Benjamin/Cummings Publishing Company,
1989.
Text.