Gaya APA
TOEFL iBT. (2006).
New York:
Barron\'s Educational Series.
Gaya Chicago
TOEFL iBT.
13th Ed.
New York:
Barron\'s Educational Series,
2006.
Text.
Gaya MLA
TOEFL iBT.
13th Ed.
New York:
Barron\'s Educational Series,
2006.
Text.
Gaya Turabian
TOEFL iBT.
New York:
Barron\'s Educational Series,
2006.
Print.