Bibliography
- Goldblatt, David. The Ball is Round: A Global History of Football. Penguin Books (2007).
- Tossell, David. Playing for Uncle Sam: The Brits' Story of the North American Soccer League. Mainstream Publishing (2003).
- Wangerin, David. Soccer in a Football World:The Story of America's Forgotten Game. WSC Books (2006).
Read more about this topic: Expansion Of Major League Soccer