APA (7th ed.) Citation

Baker, G., Gordon, L., & Millikin, S. (1975). USA 1890-1939. The Open University Press.

Chicago Style (17th ed.) Citation

Baker, Geoffrey, Lindsay Gordon, and Sandra Millikin. USA 1890-1939. Keynes: The Open University Press, 1975.

MLA (9th ed.) Citation

Baker, Geoffrey, et al. USA 1890-1939. The Open University Press, 1975.