APA Style
Gregory, P, H. (2012).
CISA Certified Information Systems Auditor All-in-One Exam Guide 2 Ed. (2).
New York:
.
MLA Style
Gregory, Peter, H.
"CISA Certified Information Systems Auditor All-in-One Exam Guide 2 Ed.".
2
New York:
,
2012.
Sistem Informasi.