Gaya APA
Introductions to Information System. (2007).
New York:
[s.n.].
Gaya Chicago
Introductions to Information System.
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New York:
[s.n.],
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Text.
Gaya MLA
Introductions to Information System.
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New York:
[s.n.],
2007.
Text.
Gaya Turabian
Introductions to Information System.
New York:
[s.n.],
2007.
Print.