Philippa Gregory (2011). “Philippa Gregory's Tudor Court 6-Book Boxed Set: The Constant Princess, The Other Boleyn Girl, The Boleyn Inheritance, The Queen's Fool, The Virgin's Lover, and The Other Queen”, p.90, Simon and Schuster
Henry David Thoreau (2014). “Citizen Thoreau: Walden, Civil Disobedience, Life Without Principle, Slavery in Massachusetts, A Plea for Captain John Brown”, p.68, Graphic Arts Books