Gaya APA
Practical English Usage. (2005).
New York:
Oxford University Press.
Gaya Chicago
Practical English Usage.
.
New York:
Oxford University Press,
2005.
Text.
Gaya MLA
Practical English Usage.
.
New York:
Oxford University Press,
2005.
Text.
Gaya Turabian
Practical English Usage.
New York:
Oxford University Press,
2005.
Print.