Gaya APA
Cobit 4.1. (2007).
united states of America:
.
Gaya Chicago
Cobit 4.1.
.
united states of America:
,
2007.
Text Book.
Gaya MLA
Cobit 4.1.
.
united states of America:
,
2007.
Text Book.
Gaya Turabian
Cobit 4.1.
united states of America:
,
2007.
Text Book.