APA (7th ed.) Citation

O'Neill, E. (1989). Long day's journey into night. Yale Univ. Press.

Chicago Style (17th ed.) Citation

O'Neill, Eugene. Long Day's Journey into Night. New Haven u.a: Yale Univ. Press, 1989.

MLA (9th ed.) Citation

O'Neill, Eugene. Long Day's Journey into Night. Yale Univ. Press, 1989.

Warning: These citations may not always be 100% accurate.