You will also need to find some reviews of film or staged adaptations of your play. Magazines and newspapers are great resources for this type of information. Try some of the databases below by searching for the title of your play or its adaptation(s).
Although you can't use Wikipedia as a source in your paper, you can use it to find out basic information about performances and adaptations of your play. Also, you can sometimes get direct links to quality reviews in the "references" section of a Wikipedia entry. If you do this, don't forget to evaluate the credibility of the review!