APA (7th ed.) Citation

Armstrong, W. A. (1971). Sean O'Casey. Published for the British council by Longman Group.

Chicago Style (17th ed.) Citation

Armstrong, William A. Sean O'Casey. [Harlow, England]: Published for the British council by Longman Group, 1971.

MLA (9th ed.) Citation

Armstrong, William A. Sean O'Casey. Published for the British council by Longman Group, 1971.

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