APA (7th ed.) Citation

O'Neill, E. (1972). Long day's journey into night. Caedmon.

Chicago Style (17th ed.) Citation

O'Neill, Eugene. Long Day's Journey into Night. N.Y., N.Y.: Caedmon, 1972.

MLA (9th ed.) Citation

O'Neill, Eugene. Long Day's Journey into Night. Caedmon, 1972.