Cita APA (7th ed.)

Sheaffer, L. (1968). O´Neill son and Playwright. Little, Brown and Company.

Cita Chicago (17th ed.)

Sheaffer, Louis. O´Neill Son and Playwright. Estados Unidos: Little, Brown and Company, 1968.

Cita MLA (9th ed.)

Sheaffer, Louis. O´Neill Son and Playwright. Little, Brown and Company, 1968.