ChartsBin statistics collector team 2009, Major Religions of the World Ranked by Number of Adherents, ChartsBin, viewed 9th February, 2010, <http://chartsbin.com/view/3nr>.
Source
The Office of International Religious Freedom 2008, International Religious Freedom, 2008, The U.S. State Department, United States, viewed 16th September, 2009, <http://www.state.gov/g/drl/rls/irf/index.htm>.
The Association of Religion Data Archives 2006, National Profiles, Department of Sociology, The Pennsylvania State University, University Park, PA, viewed 16th September, 2009, <http://www.thearda.com/internationalData/>.
