Gaya APA
Friedman, G.
(2010).
The Next 100 Years: A forecast for The 21st Century
(
1)
.
Amerika:
CPI bookmarque.
Gaya MLA
Friedman, George.
"The Next 100 Years: A forecast for The 21st Century".
1
Amerika:
CPI bookmarque,
2010.
Text.