1. National Politics Study, 2004
2. Green, John C. , Jones, Robert P. , and Cox., Daniel 2009. Faithful, Engaged, and Divergent: A Comparative Portrait of Conservative and Progressive Religious Activists in the 2008 Election and Beyond. Ray C. Bliss Institute of Applied Politics and Public Religion Research. University of Akron and Public Religion Research. Accessed on Nov. 15 2019 from, https://www.uakron.edu/bliss/research/archives/2008/ReligiousActivistReport-Final.pdf