2 Book Sources:
http://books.google.com/books?id=oq2pgMztlzsC&printsec=frontcover&dq=walmart+sweatshop&hl=en&ei=p9j7TL2oHoi5nAfKooXICg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCMQ6AEwAA#v=onepage&q=sweatshop&f=false (search sweatshop)
Title- The Wal-Mart Effect by Charles Fishman
http://books.google.com/books?id=cK9xX4FoBmYC&pg=PA125&dq=walmart+sweatshop&hl=en&ei=59z7TJTCPIuwnge2hP3FCg&sa=X&oi=book_result&ct=result&resnum=3&ved=0CC0Q6AEwAg#v=onepage&q&f=false (page 25)
Title- Nice work if you can get it: life and labor in precarious times by Andrew Ross
