Nine plays
MLA
O'Neill, Eugene, and Joseph Wood Krutch. Nine Plays. New York: The Modern Library, 1941.
APA
O'Neill, E., & Krutch, J. Wood. (1941). Nine plays. New York: The Modern Library.
Chicago
O'Neill, Eugene, and Joseph Wood Krutch. Nine Plays. New York: The Modern Library, 1941.