1. US Census Bureau. Statistical abstract of the United States. Washington, DC: US Government Printing Office; 1972.
2. US Census Bureau. Statistical abstract of the United States. Washington, DC: US Government Printing Office; 2006.
3. Camarota SA. Immigrants in the United States–2000: a snapshot of America’s foreign-born population. Washington, DC: Center for Immigration Studies; 2001.
4. Schmidley AD. Profile of the foreign-born population in the United States: 2000. Current population reports, ed. US Census Bureau. Vol. series P23-206. Washington, DC: US Government Printing Office; 2001.
5. Escobar JI, Hoyos Nervi C, Gara MA. Immigration and mental health: Mexican Americans in the United States. Harv Rev Psychiatry. 2000;8(2):64–72.