Cita APA (7a ed.)

Adam, A. C., & Cullen, D. (2003). O Holy Night. Irish Tenors.

Cita Chicago Style (17a ed.)

Adam, Adoiphe Charles, y David Cullen. O Holy Night. Dublin: Irish Tenors, 2003.

Cita MLA (9a ed.)

Adam, Adoiphe Charles, y David Cullen. O Holy Night. Irish Tenors, 2003.