APA (7th ed.) Citation

Pirandello, L., Witt, M., & Witt, M. A. F. (2013). Six characters in search of an author. Italica Press.

Chicago Style (17th ed.) Citation

Pirandello, Luigi, Martha Witt, and Mary Ann Frese Witt. Six Characters in Search of an Author. New York: Italica Press, 2013.

MLA (8th ed.) Citation

Pirandello, Luigi, et al. Six Characters in Search of an Author. Italica Press, 2013.