Copies of the play, Richard III, are available from online sources including:
You can also check out an electronic version of the book
Author information is very important when doing a critical analysis of a work, especially when you are asked to provide a brief biography of the author or a bibliography. The resources listed here will help you to find information about William Shakespeare.
SEARCH HINT: Do a Subject search on Shakespeare, William, 1564-1616.
SEARCH HINT: Search "Richard III" AND Shakespeare to limit results to relevant studies and essays.