Cita APA (7a ed.)

Gelb, A., & Gelb, B. (1962). O'Neill ([1st ed.].). Harper.

Cita Chicago Style (17a ed.)

Gelb, Arthur, y Barbara Gelb. O'Neill. [1st ed.]. New York: Harper, 1962.

Cita MLA (9a ed.)

Gelb, Arthur, y Barbara Gelb. O'Neill. [1st ed.]. Harper, 1962.