Gaya APA
The official guide for GMAT review. (1994).
USA:
GMAT.
Gaya Chicago
The official guide for GMAT review.
Edisi ke-7.
USA:
GMAT,
1994.
Text.
Gaya MLA
The official guide for GMAT review.
Edisi ke-7.
USA:
GMAT,
1994.
Text.
Gaya Turabian
The official guide for GMAT review.
USA:
GMAT,
1994.
Print.