John Ruskin (1868). “Time and Tide, by Weare and Tyne. Twenty-five letters to a Working Man of Sunderland (Thomas Dixon) on the laws of work ... Second edition”, p.37
Oscar Wilde, Russell Jackson, Joseph Bristow, Ian Small (2000). “The Complete Works of Oscar Wilde: The picture of Dorian Gray : the 1890 and 1891 texts”, p.30, Oxford University Press on Demand
Robert Burns, James Currie, Robert Hartley Cromek (1839). “The prose works of Robert Burns: with the notes of Currie and Cromek, and many by the present editor”, p.57
Marcus Aurelius, Epictetus, Lucius Annaeus Seneca (2015). “Stoic Six Pack: Meditations of Marcus Aurelius The Golden Sayings Fragments and Discourses of Epictetus Letters from a Stoic and The Enchiridion”, p.72, Lulu.com