APA (7th ed.) Citation

Gillman, H., Graber, M. A., & Whittington, K. E. (2013). American constitutionalism. Oxford University Press.

Chicago Style (17th ed.) Citation

Gillman, Howard, Mark A. Graber, and Keith E. Whittington. American Constitutionalism. New York: Oxford University Press, 2013.

MLA (9th ed.) Citation

Gillman, Howard, et al. American Constitutionalism. Oxford University Press, 2013.

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