The Picture of Dorian Gray ch. 4 (1891). In Wilde's play LadyWindermere's Fan, act 3 (1892), Lord Darlington replies to the question "What is a cynic?": "A man who knows the price of everything and the value of nothing."
Bram Stoker, Mary Shelley, Oscar Wilde (2015). “The Penny Dreadfuls: Tales of Horror: Dracula, Frankenstein, and The Picture of Dorian Gray”, p.719, Skyhorse Publishing, Inc.
Oscar Wilde (2013). “The Picture of Dorian Gray: The Story of a Fashionable Young Man Who Sells His Soul for Eternal Youth and Beauty (Beloved Books Edition)”, p.15, Lulu Press, Inc
Oscar Wilde (2013). “The Picture of Dorian Gray: The Story of a Fashionable Young Man Who Sells His Soul for Eternal Youth and Beauty (Beloved Books Edition)”, p.15, Lulu Press, Inc