APA (7th ed.) Citation

Edgar, D., Barnes, M., & Sachs, A. (1987). Plays--one. Methuen London.

Chicago Style (17th ed.) Citation

Edgar, David, Mary Barnes, and Albie Sachs. Plays--one. London ; New York, NY: Methuen London, 1987.

MLA (9th ed.) Citation

Edgar, David, et al. Plays--one. Methuen London, 1987.