Gaya APA
New GMAT premier 2013. (2012).
New York:
Kaplan.
Gaya Chicago
New GMAT premier 2013.
.
New York:
Kaplan,
2012.
Text.
Gaya MLA
New GMAT premier 2013.
.
New York:
Kaplan,
2012.
Text.
Gaya Turabian
New GMAT premier 2013.
New York:
Kaplan,
2012.
Print.