Bruce D. Perry, Maia Szalavitz (2017). “The Boy Who Was Raised as a Dog: And Other Stories from a Child Psychiatrist's Notebook--What Traumatized Children Can Teach Us About Loss, Love, and Healing”, p.85, Hachette UK
Thomas Paine (1830). “Brief sketch of the life of Thomas Paine. Common sense. Epistle to Quakers. The crisis. Public good. Letter to the Abbe Raynal. Dissertations on government, the affairs of the bank, and paper money. Miscellaneous”, p.404