Dyfyniad APA
LaFeber, W., & Polenberg, R. (1975). The American century: A history of the United States since the 1890s. Wiley.
Dyfyniad Arddull Chicago
LaFeber, Walter, and Richard Polenberg. The American Century: A History of the United States Since the 1890s. New York: Wiley, 1975.
Dyfyniad MLA
LaFeber, Walter, and Richard Polenberg. The American Century: A History of the United States Since the 1890s. Wiley, 1975.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.