APA (7th ed.) Citation

Williams, W. A. (1978). Americans in a changing world: A history of the United States in the twentieth century. Harper & Row.

Chicago Style (17th ed.) Citation

Williams, William Appleman. Americans in a Changing World: A History of the United States in the Twentieth Century. New York: Harper & Row, 1978.

MLA (9th ed.) Citation

Williams, William Appleman. Americans in a Changing World: A History of the United States in the Twentieth Century. Harper & Row, 1978.