"John Sholto Douglas Queensberry, 8th marquess of." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 14 Nov. 2009 <http://www.encyclopedia.com>.
"John Sholto Douglas Queensberry, 8th marquess of." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (November 14, 2009). http://www.encyclopedia.com/doc/1E1-QunsbryJSD.html
"John Sholto Douglas Queensberry, 8th marquess of." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved November 14, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-QunsbryJSD.html