Langston Hughes (1995). “Langston Hughes and the Chicago Defender: Essays on Race, Politics, and Culture, 1942-62”, p.104, University of Illinois Press
Charlotte Bronte, Emily Bronte, Anne Bronte (2009). “The Bronte Sisters: Three Novels: Jane Eyre; Wuthering Heights; and Agnes Grey (Penguin Classics Deluxe Edition)”, p.408, Penguin