APA Style
Gregory, William. ().
The Real Toefl / William Gregory .
Jakarta:
Penerbit HB.
Chicago Style
Gregory, William.
The Real Toefl / William Gregory.
Jakarta:
Penerbit HB,
.
Text.
MLA Style
Gregory, William.
The Real Toefl / William Gregory.
Jakarta:
Penerbit HB,
.
Text.
Turabian Style
Gregory, William.
The Real Toefl / William Gregory.
Jakarta:
Penerbit HB,
.
Print.