Gaya APA
Friedman, G. (2009).
The Next 100 Years: A Forecast For the 21st Century .
New York:
Doubleday.
Gaya Chicago
Friedman, G..
The Next 100 Years: A Forecast For the 21st Century.
New York:
Doubleday,
2009.
Text.
Gaya MLA
Friedman, George.
"The Next 100 Years: A Forecast For the 21st Century".
New York:
Doubleday,
2009.
Text.
Gaya Turabian
Friedman, George..
The Next 100 Years: A Forecast For the 21st Century.
New York:
Doubleday,
2009.
Print.