Janda, K., Berry, J. M., & Goldman, J. (2000). The challenge of democracy: Government in America : 1999-2000 update (Sixth edition.). Houghton Mifflin.
Chicago-viite (17. p.)Janda, Kenneth, Jeffrey M. Berry, ja Jerry Goldman. The Challenge of Democracy: Government in America : 1999-2000 Update. Sixth edition. Boston: Houghton Mifflin, 2000.
MLA-viite (9. p.)Janda, Kenneth, et al. The Challenge of Democracy: Government in America : 1999-2000 Update. Sixth edition. Houghton Mifflin, 2000.
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