APA (7th ed.) Citation

Williams, W. A. (1966). The contours of American history. Quadrangle Books.

Chicago Style (17th ed.) Citation

Williams, William Appleman. The Contours of American History. Chicago: Quadrangle Books, 1966.

MLA (9th ed.) Citation

Williams, William Appleman. The Contours of American History. Quadrangle Books, 1966.

Warning: These citations may not always be 100% accurate.