Rastogi, Sonya; Johnson, Tallese D.; Hoeffel, Elizabeth M.; Drewery, Jr., Malcolm P. The Black Population: 2010(PDF). United States Census Bureau: 3. September 2011 [2012-02-15]. (原始内容存档(PDF)于2017-03-12).
Rastogi, Sonya; Johnson, Tallese D.; Hoeffel, Elizabeth M.; Drewery, Jr., Malcolm P. The Black Population: 2010(PDF). United States Census Bureau: 3. September 2011 [2012-02-15]. (原始内容存档(PDF)于2017-03-12).