Cita APA (7th ed.)
Gelb, A., & Gelb, B. (1962). O'Neill. Cape.
Cita Chicago (17th ed.)
Gelb, Arthur, i Barbara Gelb. O'Neill. London: Cape, 1962.
Cita MLA (9th ed.)
Gelb, Arthur, i Barbara Gelb. O'Neill. Cape, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.