John Stuart Mill (2017). “JOHN STUART MILL - Ultimate Collection: Works on Philosophy, Politics & Economy (Including Memoirs & Essays): Autobiography, Utilitarianism, The Subjection of Women, On Liberty, Principles of Political Economy, A System of Logic, Ratiocinative and Inductive and More”, p.71, Madison & Adams
Horace Mann (1850). “A Few Thoughts for a Young Man: A Lecture, Delivered Before the Boston Mercantile Library Association, on Its 29th Anniversary”, p.70
John Buchan (2016). “The Complete Works of John Buchan (Unabridged): Thriller Classics, Spy Novels, Supernatural Tales, Short Stories, Poetry, Historical Works, The Great War Writings, Essays, Biographies & Memoirs – All in One Volume”, p.1649, e-artnow