Gaya APA
Edward, Chris. (1991).
the essence of Information System (1).
New York:
Prentice Hall.
Gaya Chicago
Edward, Chris.
the essence of Information System.
1
New York:
Prentice Hall,
1991.
Text.
Gaya MLA
Edward, Chris.
the essence of Information System.
1
New York:
Prentice Hall,
1991.
Text.
Gaya Turabian
Edward, Chris.
the essence of Information System.
1
New York:
Prentice Hall,
1991.
Print.