Gaya APA
Cliffs TOEFL Preparation Guide. (1995).
USA:
Cliifs Notes.
Gaya Chicago
Cliffs TOEFL Preparation Guide.
ed.5.
USA:
Cliifs Notes,
1995.
.
Gaya MLA
Cliffs TOEFL Preparation Guide.
ed.5.
USA:
Cliifs Notes,
1995.
.
Gaya Turabian
Cliffs TOEFL Preparation Guide.
USA:
Cliifs Notes,
1995.
.