Dyfyniad APA

Lenz, L. (2008). Power and policy: America's first steps to superpower, 1889-1922. Algora Pub..

Dyfyniad Arddull Chicago

Lenz, Lawrence. Power and Policy: America's First Steps to Superpower, 1889-1922. New York: Algora Pub., 2008.

Dyfyniad MLA

Lenz, Lawrence. Power and Policy: America's First Steps to Superpower, 1889-1922. Algora Pub., 2008.

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