APA (7th ed.) Citation

O'Casey, S. (1951). Collected plays. Macmillan [u.a.].

Chicago Style (17th ed.) Citation

O'Casey, Sean. Collected Plays. London: Macmillan [u.a.], 1951.

MLA (9th ed.) Citation

O'Casey, Sean. Collected Plays. Macmillan [u.a.], 1951.

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