Dyfyniad APA

Friedman, G. (2009). THE NEXT 100 YEARS: A FORECAST FOR THE 21ST CENTURY. Doubleday.

Dyfyniad Arddull Chicago

Friedman, George. THE NEXT 100 YEARS: A FORECAST FOR THE 21ST CENTURY. New York: Doubleday, 2009.

Dyfyniad MLA

Friedman, George. THE NEXT 100 YEARS: A FORECAST FOR THE 21ST CENTURY. Doubleday, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.