Dyfyniad APA

Riegel, R. E., & Haugh, H. (1953). United States of America: A history. Scribner.

Dyfyniad Arddull Chicago

Riegel, Robert Edgar, and Helen Haugh. United States of America: A History. New York: Scribner, 1953.

Dyfyniad MLA

Riegel, Robert Edgar, and Helen Haugh. United States of America: A History. Scribner, 1953.

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