I am writing a term paper, and I am in the process of gathering research. I understand that if a work does not have an author, the title is used at the beginning of the bibliography as well as in the parenthetical documentation. My dilemma is that I have two articles with the same title "T.S. Eliot" and neither article has an author. How would I parenthetically document these two different sources?

Assume a hanging indent

Source 1:
"T.S. Eliot." American Writes: A Collection of Literary Biographies. Ed. Leonard Unger. New York: Charles Scribners's Sons, 1974. 567-589.

Source 2:
"T.S. Eliot." The American Experience. Eds. Don Deshler, Kevin Feldman, Katie Kinsella, and Sharon Vaugh. New Jersey: Pearson Prentice Hall, 2007. 714.