Marin, Solano, Sonoma and Contra Costa Counties' borders come to a common point c. 6 miles into San Francisco Bay (coming from the north). Thus, Sonoma County is an adjacent county. Hittell, Theodore Henry (1876). The codes and statutes of the State of California. A. L. Bancroft. pp. 514, 515. Retrieved August 20, 2012.
"Table 11: Crimes – 2009"(PDF). Office of the Attorney General, Department of Justice, State of California. Archived from the original(PDF) on December 2, 2013. Retrieved November 14, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B02001. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 26, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B03003. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 26, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19301. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19013. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19113. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B01003. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
"2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Archived from the original on September 25, 2015. Retrieved September 24, 2015.
"2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Archived from the original on September 25, 2015. Retrieved September 24, 2015.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B02001. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 26, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B03003. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 26, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19301. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19013. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B19113. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
U.S. Census Bureau. American Community Survey, 2011 American Community Survey 5-Year Estimates, Table B01003. U.S. Census websiteArchived December 27, 1996, at the Wayback Machine . Retrieved October 21, 2013.
Contra Costa County Elections Division. [1]Archived November 30, 2016, at the Wayback Machine. Retrieved November 29, 2016.
"Table 11: Crimes – 2009"(PDF). Office of the Attorney General, Department of Justice, State of California. Archived from the original(PDF) on December 2, 2013. Retrieved November 14, 2013.