Gaya APA
Understanding and Using English Grammar. (1989).
:
.
Gaya Chicago
Understanding and Using English Grammar.
Kedua.
:
,
1989.
.
Gaya MLA
Understanding and Using English Grammar.
Kedua.
:
,
1989.
.
Gaya Turabian
Understanding and Using English Grammar.
:
,
1989.
.