IAN CHILVERS. "Yeats, Jack Butler." The Concise Oxford Dictionary of Art and Artists. 2003. Encyclopedia.com. 8 Nov. 2009 <http://www.encyclopedia.com>.
IAN CHILVERS. "Yeats, Jack Butler." The Concise Oxford Dictionary of Art and Artists. 2003. Encyclopedia.com. (November 8, 2009). http://www.encyclopedia.com/doc/1O3-YeatsJackButler.html
IAN CHILVERS. "Yeats, Jack Butler." The Concise Oxford Dictionary of Art and Artists. 2003. Retrieved November 08, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O3-YeatsJackButler.html