Gaya APA
Oxford English Grammar Course. (2011).
:
.
Gaya Chicago
Oxford English Grammar Course.
Cet. 2011.
:
,
2011.
Text.
Gaya MLA
Oxford English Grammar Course.
Cet. 2011.
:
,
2011.
Text.
Gaya Turabian
Oxford English Grammar Course.
:
,
2011.
Print.