APA (7th ed.) Citation

Watling, E. (1974). The theban plays. Penguin books.

Chicago Style (17th ed.) Citation

Watling, E.F. The Theban Plays. New York: Penguin books, 1974.

MLA (9th ed.) Citation

Watling, E.F. The Theban Plays. Penguin books, 1974.