Passel, Jeffrey S. and D’Vera Cohn, 2015. “Share of Unauthorized Immigrant Workers in Production, Construction Jobs Falls Since 2007.” Washington, D.C.: Pew Research Center, March.

Passel, Jeffrey S. and D’Vera Cohn. 2014. “Unauthorized Immigrant Totals Rise in 7 States, Fall in 14.” Washington, D.C.: Pew Research Center, November.

Passel, Jeffrey S. and D’Vera Cohn. 2009. “A Portrait of Unauthorized Immigrants in the United States.” Washington, D.C.: Pew Research Center, April.

Passel, Jeffrey S., D’Vera Cohn, and Ana Gonzalez-Barrera. 2012. “Net Migration from Mexico Falls to Zero—and Perhaps Less.” Washington, D.C.: Pew Research Center, April.