Cita APA (7th ed.)

Gelb, A., & Gelb, B. (1965). O'Neill. Dell Publishing.

Cita Chicago (17th ed.)

Gelb, Arthur, i Barbara Gelb. O'Neill. Nueva York: Dell Publishing, 1965.

Cita MLA (9th ed.)

Gelb, Arthur, i Barbara Gelb. O'Neill. Dell Publishing, 1965.