George MacDonald, Rolland Hein (2004). “The Heart of George MacDonald: A One-Volume Collection of His Most Important Fiction, Essays, Sermons, Drama, and Biographical Information”, p.39, Regent College Publishing
Charlotte Bronte, Emily Bronte, Anne Bronte (2009). “The Bronte Sisters: Three Novels: Jane Eyre; Wuthering Heights; and Agnes Grey (Penguin Classics Deluxe Edition)”, p.115, Penguin
Charlotte Bronte, Emily Bronte, Anne Bronte (2009). “The Bronte Sisters: Three Novels: Jane Eyre; Wuthering Heights; and Agnes Grey (Penguin Classics Deluxe Edition)”, p.235, Penguin
George MacDonald (2015). “George MacDonald: The Complete Fantasy Collection - 8 Novels & 30+ Short Stories and Fairy Tales (Illustrated): The Princess and the Goblin, Lilith, Phantastes, The Princess and Curdie, At the Back of the North Wind, Portent, The Lost Princess, Adela Cathcart, Dealings with the Fairies and many more”, p.106, e-artnow