1. American Immigration Council 2015 Sanctuary Cities http://www.immigrationpolicy.org/just-facts/sanctuary-cities-trust-acts-and-community-policing-explained
2. Sanctuary: a politics of ease?;Bagelman;Alternatives: Global, Local, Political,2013
3. Cities of refuge: No federal pre-emption of ordinances restricting local government cooperation with the INS;Bau;Berkeley La Raza Law Journal,1994
4. Immigration Dialectic