Friedman, G. (2009). THE NEXT 100 YEARS: A FORECAST FOR THE 21ST CENTURY. Doubleday.
Chicago-čujuhus (17. p.)Friedman, George. THE NEXT 100 YEARS: A FORECAST FOR THE 21ST CENTURY. New York: Doubleday, 2009.
MLA-čujuhus (9. p.)Friedman, George. THE NEXT 100 YEARS: A FORECAST FOR THE 21ST CENTURY. Doubleday, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.