Gaya APA
zar. (2002).
Understanding and using english grammar (Third).
:
longman.
Gaya Chicago
zar.
Understanding and using english grammar.
Third
:
longman,
2002.
Text.
Gaya MLA
zar.
Understanding and using english grammar.
Third
:
longman,
2002.
Text.
Gaya Turabian
zar.
Understanding and using english grammar.
Third
:
longman,
2002.
Print.