APA (7th ed.) Citation

O'Casey, S. (1949). I knock at the door: Swift glances back at things that made me. Macmillan Co..

Chicago Style (17th ed.) Citation

O'Casey, Sean. I Knock at the Door: Swift Glances Back at Things That Made Me. New York: Macmillan Co., 1949.

MLA (9th ed.) Citation

O'Casey, Sean. I Knock at the Door: Swift Glances Back at Things That Made Me. Macmillan Co., 1949.