Gaya APA
GMAT Review. (2005).
Amerika:
Administion council.
Gaya Chicago
GMAT Review.
.
Amerika:
Administion council,
2005.
Buku.
Gaya MLA
GMAT Review.
.
Amerika:
Administion council,
2005.
Buku.
Gaya Turabian
GMAT Review.
Amerika:
Administion council,
2005.
Buku.