Gaya APA
PREPARATION COURSE FOR THE TOEFL. (2004).
Pekanbaru:
UNRI.
Gaya Chicago
PREPARATION COURSE FOR THE TOEFL.
.
Pekanbaru:
UNRI,
2004.
Non Fiksi.
Gaya MLA
PREPARATION COURSE FOR THE TOEFL.
.
Pekanbaru:
UNRI,
2004.
Non Fiksi.
Gaya Turabian
PREPARATION COURSE FOR THE TOEFL.
Pekanbaru:
UNRI,
2004.
Non Fiksi.