Amy, Douglas J. 2000. Behind the Ballot Box: A Citizen's Guide to Voting Systems. Westport, CT: Praeger.
Amy, Douglas J. 2002. Real Choices/New Voices: How Proportional Representation Elections Could Revitalize American Democracy. 2nd ed. New York: Columbia University Press.
Bowler, Shaun, and Todd Donovan. 1998. Demanding Choices: Opinion, Voting, and Direct Democracy. Ann Arbor: University of Michigan Press.
Bowler, Shaun, Todd Donovan, and Trudi Happ. 1992. "Ballot Propositions and Information Costs: Direct Democracy and the Fatigued Voter." The Western Political Quarterly 45 (2): 559-568.
Cain, Bruce E., and Kenneth P. Miller. 2001. "The Populist Legacy: Initiatives and the Undermining of Representative Government." In Dangerous Democracy? The Battle over Ballot Initiatives in America, eds. Larry J. Sabato, Howard R. Ernst and Bruce A. Larson. New York: Rowman & Littlefield.
California Democratic Party. 2012. "By-laws and Rules of the California Democratic Party." http://www.cadem.org/admin/miscdocs/files/CDP-BY-LAWS.pdf (July 11, 2013).
California Republican Party. 2012. "Standing Rules and Bylaws of the California Republican Party." http://cagop.org/pdf/Standing_Rules_and_Bylaws_2-26-2012.pdf (July 11, 2013).
California Secretary of State. 2013a. "Qualified Political Parties." http://www.sos.ca.gov/elections/political-parties/qualified-political-party.htm (July 11, 2013).
California Secretary of State. 2013b. "Initiative Guide." http://www.sos.ca.gov/elections/ballot-measures/initiative-guide.htm (July 11, 2013).
California Secretary of State. 2013c. "Political Party Qualification." http://www.sos.ca.gov/elections/political-parties/political-party-qualification.htm (July 11, 2013).
Center for Governmental Studies. 2008. Democracy by Initiative: Shaping California's Fourth Branch of Government. 2nd ed. Los Angeles. http://d1lj51l9p3qzy9.cloudfront.net/handle/10207/bitstreams/5800.pdf (July 11, 2013).
Cronin, Thomas E. 1989. Direct Democracy: The Politics of Initiative, Referendum, and Recall. Cambridge: Harvard University Press.
Donovan, Todd, and Shaun Bowler. 1998. "Responsive or Responsible Government?" In Citizens as Legislators: Direct Democracy in the American States, eds. Shaun Bowler, Todd Donovan and Caroline Tolbert. Columbus: Ohio State University Press.
Lupia, Arthur. 1994. "Shortcuts versus Encyclopedias: Information and Voting Behavior in California Insurance Reform Elections." American Political Science Review 88 (1): 63–76. http://www-personal.umich.edu/~lupia/Papers/Lupia1994_ShortcutsEncyclopedias.pdf (July 11, 2013).
Mathews, Joe, and Mark Paul. 2010. California Crackup: How Reform Broke the Golden State and How We Can Fix It. Berkeley: University of California Press.
Matsusaka, John G. 2005. "A Rolling Snowball of Direct Democracy." Los Angeles Time, 15 June, B13.
Reynolds, Andrew, Ben Reilly, and Andrew Ellis. 2005. Electoral System Design: The New International IDEA Handbook. Stockholm: International Institute for Democracy and Electoral Assistance. http://www.idea.int/publications/esd/upload/ESD_Handb_low.pdf (July 11, 2013).
Sabato, Larry J., and Bruce A. Larson. 2002. The Party's Just Begun: Shaping Political Parties for America's Future. 2nd ed. New York: Longman.
Tolbert, Caroline J., Daniel H. Lowenstein, and Todd Donovan. 1998. "Election Law and Rules for Using Initiatives." In Citizens as Legislators: Direct Democracy in the American States, eds. Shaun Bowler, Todd Donovan and Caroline Tolbert. Columbus: Ohio State University Press.