Gaya APA
Northstar Focus Reading and Writing. (2002).
:
Longman.
Gaya Chicago
Northstar Focus Reading and Writing.
.
:
Longman,
2002.
.
Gaya MLA
Northstar Focus Reading and Writing.
.
:
Longman,
2002.
.
Gaya Turabian
Northstar Focus Reading and Writing.
:
Longman,
2002.
.