Charlotte Bronte, Emily Bronte, Anne Bronte (2009). “The Bronte Sisters: Three Novels: Jane Eyre; Wuthering Heights; and Agnes Grey (Penguin Classics Deluxe Edition)”, p.364, Penguin
Charlotte Bronte “Annotated Jane Eyre: An Autobiography with English Grammar Exercises: by Charlotte Bronte (Author), Robert Powell (Editor)”, Powell Publications, LLC