Holmes, J. E., Engelhardt, M. J., & Elder, R. E. (1994). American government: Essentials & perspectives (2nd ed.). McGraw-Hill.

Holmes, Jack E., Michael J. Engelhardt, and Robert E. Elder. American Government: Essentials & Perspectives. 2nd ed. New York: McGraw-Hill, 1994.

Holmes, Jack E., et al. American Government: Essentials & Perspectives. 2nd ed. McGraw-Hill, 1994.