This episode discusses Shakespeare's use of source material for Romeo and Juliet as well as the imagery and symbolism to look out for as we read the play. My source for the historical information was:

Mabilard, Amanda. Sources for Romeo and Juliet. Shakespeare Online. 21 Nov. 2009. http://www.shakespeare-online.com/sources/romeosources.html

My source for the analysis was:

Spurgeon, Caroline. "The Imagery of Romeo and Juliet." Shakespeare: Modern Essays in Criticism. Oxford University Press, Oxford, 1957.