APA (7th ed.) Citation

Caldwell, R. G. (1925). A short history of the American people. G.P. Putnam's sons.

Chicago Style (17th ed.) Citation

Caldwell, Robert Granville. A Short History of the American People. New York London: G.P. Putnam's sons, 1925.

MLA (9th ed.) Citation

Caldwell, Robert Granville. A Short History of the American People. G.P. Putnam's sons, 1925.