Gaya APA
State Of The World. (2008).
London, New York:
.
Gaya Chicago
State Of The World.
.
London, New York:
,
2008.
Text.
Gaya MLA
State Of The World.
.
London, New York:
,
2008.
Text.
Gaya Turabian
State Of The World.
London, New York:
,
2008.
Print.