PHYLLIS HARTNOLL and PETER FOUND. "Advent Play." The Concise Oxford Companion to the Theatre. 1996. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.
PHYLLIS HARTNOLL and PETER FOUND. "Advent Play." The Concise Oxford Companion to the Theatre. 1996. Encyclopedia.com. (December 16, 2009). http://www.encyclopedia.com/doc/1O79-AdventPlay.html
PHYLLIS HARTNOLL and PETER FOUND. "Advent Play." The Concise Oxford Companion to the Theatre. 1996. Retrieved December 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O79-AdventPlay.html