APA-referens (7:e uppl.)

Gassner, J. (1964). O'Neill, a collection of critical essays. Prentice-Hall.

Chicago-referens (17:e uppl.)

Gassner, John. O'Neill, a Collection of Critical Essays. Englewood Cliffs, N.J: Prentice-Hall, 1964.

MLA-referens (9:e uppl.)

Gassner, John. O'Neill, a Collection of Critical Essays. Prentice-Hall, 1964.