APA (7th ed.) Citation

Balkin, J. M., & Siegel, R. B. (2009). The Constitution in 2020. Oxford University Press.

Chicago Style (17th ed.) Citation

Balkin, J. M., and Reva B. Siegel. The Constitution in 2020. Oxford ; New York: Oxford University Press, 2009.

MLA (9th ed.) Citation

Balkin, J. M., and Reva B. Siegel. The Constitution in 2020. Oxford University Press, 2009.