1. U.S. Census Bureau. U.S. census 2000. 2000.
2. Eltis D, Richardson D. Routes to slavery: direction, ethnicity, and mortality in the transatlantic slave trade. London; Portland, OR: Frank Cass; 1997. p. 151.
3. Worth R, Asher R. Africans in America. New York: Facts On File; 2005. p. 96.
4. Reimers DM. Still the golden door: the third world comes to America. 2nd ed. New York: Columbia University Press; 1992. p. 362.
5. Coutin SB. Nations of emigrants: shifting boundaries of citizenship in El Salvador and the United States. Ithaca: Cornell University Press; 2007. p. 263.