George MacDonald (2015). “The Complete Novels of George Macdonald (Illustrated): The Princess and the Goblin, The Princess and Curdie, Phantastes, At the Back of the North Wind, Lilith, David Elginbrod, Malcolm, Ranald Bannerman's Boyhood, Wilfrid Cumbermede and many more”, p.1569, e-artnow
Margaret Sanger, Michael W. Perry, H. G. Wells (2003). “The Pivot of Civilization in Historical Perspective: The Birth Control Classic”, p.406, Inkling Books
Jean-Paul Sartre, Martin Heidegger, Martin Buber (2018). “The Philosophical Library Existentialism Collection: Hasidism, Essays in Metaphysics, and The Emotions”, p.109, Open Road Media