Barnes, Hazel E., Existential Ethics, Alfred A. Knopf, 1967, p. 121.

—, The Literature of Possibility, University of Nebraska Press, 1959, p. 9.

Carruth, Hayden, Introduction, in Nausea, New Directions, 1964, p. x.

Collins, James, Preface, in The Existentialists: A Critical Study, Henry Regnery Co., 1952, p. xiii.

Glicksberg, Charles I., "Literary Existentialism," in Existentialist Literature and Aesthetics, edited by William L. McBride, Garland Publinshing, 1997, pp. 2-39.

Keefe, Terry, "Beauvoir's Memoirs, Diary and Letters," in Autobiography and the Existential Self, edited by Terry Keefe and Edmund Smyth, St. Martin's Press, 1995, p. 78.