"Edward Stafford, 3d duke of Buckingham." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 25 Nov. 2009 <http://www.encyclopedia.com>.
"Edward Stafford, 3d duke of Buckingham." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (November 25, 2009). http://www.encyclopedia.com/doc/1E1-StffrdE.html
"Edward Stafford, 3d duke of Buckingham." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved November 25, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-StffrdE.html