When I was googling the names of several authors that came to mind in order to get the exact titles of their books, this link came up, and if you scroll to the bottom, a very nice bibliography appears.
http://post.queensu.ca/~smithgs/275nativism.htmlThanks to Professor Smith for saving me a lot of typing!
An addition to that bibliography that touches on policy issues (i.e., citizenship laws and interpretations of equal protection) within the broader contexts of racism, religious discrimination and nativism is Rogers Smith's
Civic Ideals.