Horace Mann (1871). “A Few Thoughts for a Young Man: A Lecture, Delivered Before the Boston Mercantile Library Association, on Its Twenty-ninth Anniversary”, p.80
John Wilmot, John Adlard (2002). “The Debt to Pleasure: John Wilmot, Earl of Rochester, in the Eyes of His Contemporaries and in His Own Poetry and Prose”, p.74, Taylor & Francis