"federalism." The Oxford Companion to Irish History. Oxford University Press. 2007. Encyclopedia.com. 22 Dec. 2009 <http://www.encyclopedia.com>.
"federalism." The Oxford Companion to Irish History. Oxford University Press. 2007. Encyclopedia.com. (December 22, 2009). http://www.encyclopedia.com/doc/1O245-federalism.html
"federalism." The Oxford Companion to Irish History. Oxford University Press. 2007. Retrieved December 22, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O245-federalism.html