Gaya APA
Driscoll,Nina O. (1999).
Challenges : Course Book .
USA:
Longman.
Gaya Chicago
Driscoll,Nina O.
Challenges : Course Book.
USA:
Longman,
1999.
.
Gaya MLA
Driscoll,Nina O.
Challenges : Course Book.
USA:
Longman,
1999.
.
Gaya Turabian
Driscoll,Nina O.
Challenges : Course Book.
USA:
Longman,
1999.
.