Gaya APA
Sullivan, Patricia Noble. (1989).
TOEFL skills for top scores .
New York:
Prentice Hall.
Gaya Chicago
Sullivan, Patricia Noble.
TOEFL skills for top scores.
New York:
Prentice Hall,
1989.
Buku.
Gaya MLA
Sullivan, Patricia Noble.
TOEFL skills for top scores.
New York:
Prentice Hall,
1989.
Buku.
Gaya Turabian
Sullivan, Patricia Noble.
TOEFL skills for top scores.
New York:
Prentice Hall,
1989.
Buku.