APA (7th ed.) Citation

Theatre Workshop (London, England), & Chilton, C. (1967). Oh, what a lovely war. Methuen.

Chicago Style (17th ed.) Citation

Theatre Workshop (London, England), and Charles Chilton. Oh, What a Lovely War. London: Methuen, 1967.

MLA (9th ed.) Citation

Theatre Workshop (London, England), and Charles Chilton. Oh, What a Lovely War. Methuen, 1967.

Warning: These citations may not always be 100% accurate.