Bickers, Kenneth N.; Stein, Robert M. (2008). «The Congressional Pork Barrel in a Republican Era». The Journal of Politics. 62 (4): 1070–1086. doi:10.1111/0022-3816.00046. JSTOR2647865.
Bickers, Kenneth N.; Stein, Robert M. (2008). «The Congressional Pork Barrel in a Republican Era». The Journal of Politics. 62 (4): 1070–1086. doi:10.1111/0022-3816.00046. JSTOR2647865.