Gaya APA
TOEFL Preparation Guide English Grammar. (2009).
Jakarta:
Gramedia.
Gaya Chicago
TOEFL Preparation Guide English Grammar.
Second Edition.
Jakarta:
Gramedia,
2009.
Buku.
Gaya MLA
TOEFL Preparation Guide English Grammar.
Second Edition.
Jakarta:
Gramedia,
2009.
Buku.
Gaya Turabian
TOEFL Preparation Guide English Grammar.
Jakarta:
Gramedia,
2009.
Buku.