William Shakespeare (2013). “Histories of Shakespeare in Plain and Simple English (a Modern Translation and the Original Version)”, p.363, BookCaps Study Guides
Charlotte Bronte, Emily Bronte, Anne Bronte (2009). “The Bronte Sisters: Three Novels: Jane Eyre; Wuthering Heights; and Agnes Grey (Penguin Classics Deluxe Edition)”, p.216, Penguin
Remark to the Daily Telegraph. "The Growth of Nationalism: Germany and Italy 1815-1939". Book by Ronald Cameron, Charles Robertson, and Christine Henderson, 1992.