Gaya APA
Let's Talk 3. (2008).
Cambridge:
Cambridge University Press.
Gaya Chicago
Let's Talk 3.
Second Edition.
Cambridge:
Cambridge University Press,
2008.
Buku.
Gaya MLA
Let's Talk 3.
Second Edition.
Cambridge:
Cambridge University Press,
2008.
Buku.
Gaya Turabian
Let's Talk 3.
Cambridge:
Cambridge University Press,
2008.
Buku.