Gaya APA
Friedman, George. (2009).
The Next 100 Years: A Forecast for the 21st Century .
United States:
Anchor books.
Gaya Chicago
Friedman, George.
The Next 100 Years: A Forecast for the 21st Century.
United States:
Anchor books,
2009.
Buku.
Gaya MLA
Friedman, George.
The Next 100 Years: A Forecast for the 21st Century.
United States:
Anchor books,
2009.
Buku.
Gaya Turabian
Friedman, George.
The Next 100 Years: A Forecast for the 21st Century.
United States:
Anchor books,
2009.
Buku.