Louis Untermeyer (1969). “The pursuit of poetry: a guide to its understanding and appreciation with an explanation of its forms and a dictionary of poetic terms”, Simon & Schuster
Martin Heidegger, Simone de Beauvoir, Jean-Paul Sartre (2016). “The Philosophical Library Existentialism Collection: Essays in Metaphysics, The Ethics of Ambiguity, and The Philosophy of Existentialism”, p.164, Open Road Media