Gaya APA
avison, D., fitzgerald, G. (2006).
information systems development methodologies, techniques & tools 4 th edition (ed. 4).
america:
mc graw hill.
Gaya MLA
avison, David., fitzgerald, Guy.
"information systems development methodologies, techniques & tools 4 th edition".
ed. 4
america:
mc graw hill,
2006.
Text.