Gaya APA
GMAT Premier 2014. (2013).
United States of America:
Kaplan Publishing.
Gaya Chicago
GMAT Premier 2014.
.
United States of America:
Kaplan Publishing,
2013.
Teks.
Gaya MLA
GMAT Premier 2014.
.
United States of America:
Kaplan Publishing,
2013.
Teks.
Gaya Turabian
GMAT Premier 2014.
United States of America:
Kaplan Publishing,
2013.
Teks.