Holmes, J. E., Engelhardt, M. J., & Elder, R. E. (1994). American government: Essentials & perspectives (2nd ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Holmes, Jack E., Michael J. Engelhardt, agus Robert E. Elder. American Government: Essentials & Perspectives. 2nd ed. New York: McGraw-Hill, 1994.
Lua MLA (8ú heag.)Holmes, Jack E., et al. American Government: Essentials & Perspectives. 2nd ed. McGraw-Hill, 1994.
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