Gaya APA
Edward, C, -, P., Ward, J. (2001).
The Essence of Information Systems Sistem Informasi (ED.1).
Yogyakarta:
Andi.
Gaya MLA
Edward, Chris, -, P., Ward, John.
"The Essence of Information Systems Sistem Informasi".
ED.1
Yogyakarta:
Andi,
2001.
Text.