Schmidt, S. W., Bardes, B. A., & Shelley, M. C. (1999). American government and politics today / Steffen W. Schmidt, Mack C. Shelley, Barbara A. Bardes (1999-2000 edition.). West/Wadworth.
Lua i Stíl Chicago (17ú heag.)Schmidt, Steffen W., Barbara A. Bardes, agus Mack C. Shelley. American Government and Politics Today / Steffen W. Schmidt, Mack C. Shelley, Barbara A. Bardes. 1999-2000 edition. Belmont, Calif. ; London: West/Wadworth, 1999.
Lua MLA (8ú heag.)Schmidt, Steffen W., et al. American Government and Politics Today / Steffen W. Schmidt, Mack C. Shelley, Barbara A. Bardes. 1999-2000 edition. West/Wadworth, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.