Gaya APA
Cotton, David. (2010).
Language leader .
Sebastopol, CA:
Prentice Hall.
Gaya Chicago
Cotton, David.
Language leader.
Sebastopol, CA:
Prentice Hall,
2010.
Text.
Gaya MLA
Cotton, David.
Language leader.
Sebastopol, CA:
Prentice Hall,
2010.
Text.
Gaya Turabian
Cotton, David.
Language leader.
Sebastopol, CA:
Prentice Hall,
2010.
Print.