Oscar Wilde (1956). “Annotated The Importance of Being Earnest: A Trivial Comedy for Serious People with English Grammar Exercises: by Oscar Wilde (Author), Robert Powell (Editor)”, p.72, Powell Publications, LLC
Oscar Wilde (1997). “Collected Works of Oscar Wilde: The Plays, the Poems, the Stories and the Essays Including De Profundis”, p.205, Wordsworth Editions