Gaya APA
Obrien, James A. (2005).
Introduction to information systems (12e).
Boston:
McGraw Hill.
Gaya Chicago
Obrien, James A.
Introduction to information systems.
12e
Boston:
McGraw Hill,
2005.
Buku.
Gaya MLA
Obrien, James A.
Introduction to information systems.
12e
Boston:
McGraw Hill,
2005.
Buku.
Gaya Turabian
Obrien, James A.
Introduction to information systems.
12e
Boston:
McGraw Hill,
2005.
Buku.