Coutin, Susan Bibler. "From Refugees to Immigrants: The Legalization Strategies of Salvadoran Immigrants and Activists." International Migration Review, 32.4 (1998): 901-925.
Hagan, Jacqueline Maria, and Susan Gonzalez Baker. "Implementing the U.S. Legalization Program: The Influence of Immigrant Communities and Local Agencies on Immigration Policy Reform." International Migration Review, 27.3 (1993): 513-536.
Hansen,E., Donohoe, M. (2003). Health Issues of Migrant Seasonal Workers. Journal of Health Care for the Poor and Underserved, 14(2), 153-164.
Loucky, James, and Marilyn M. Moors. ed. The Maya Diaspora: Guatemalan Roots, New American Lives. Temple University Press. Philadelphia. 2000.
U.S. Department of Homeland Security, (2010). U.S. Citizenship and Immigration Services. Working in the US. http://www.uscis.gov. Referenced: 11/28/2010
Vogel, Richard. "Transient Servitude: The U.S. Guest Worker Program for Exploiting Mexican and Central American Workers." Monthly Review: An Independent Socialist Magazine, 58.8 (2007): 1-22.
Villarejo, D., Baron, S. (1999). The Occupational Health Status of Hired Farmworkers. Occupational Medicine: State of the Art Reviews, 613-635.