Burden, Barry C. "Polarization, Obstruction, and Governing in the Senate" The Forum, 9.4 (2011): -. Retrieved 20 May. 2013, from doi:10.2202/1540-8884.1480

Burden, B. (2011). Polarization, Obstruction, and Governing in the Senate. The Forum, 9(4), pp. -. Retrieved 20 May. 2013, from doi:10.2202/1540-8884.1480

Burden, Barry C. 2011. Polarization, Obstruction, and Governing in the Senate. The Forum. 9(4): -. Retrieved 20 May. 2013, from doi:10.2202/1540-8884.1480