Gaya APA
Friedman, George. (2011).
The Next Decade .
USA:
Doubleday.
Gaya Chicago
Friedman, George.
The Next Decade.
USA:
Doubleday,
2011.
Text.
Gaya MLA
Friedman, George.
The Next Decade.
USA:
Doubleday,
2011.
Text.
Gaya Turabian
Friedman, George.
The Next Decade.
USA:
Doubleday,
2011.
Print.