Gaya APA
O`brien, J, A., Marakas, G, M.
(2007).
Enterprise information systems
(
13 th Ed)
.
New York:
McGraw-Hill.
Gaya MLA
O`brien, James, A.., Marakas, George, M..
"Enterprise information systems".
13 th Ed
New York:
McGraw-Hill,
2007.
Text.