1. Simon Callow, Being An Actor (London, 1985) p. 180.
2. Brian Rix, My Farce From My Elbow (London, 1975) p. 216.
3. J. Gassner, E. Quin, Readers Encyclopedia of World Drama (London, 1970) p. 265.
4. Maurice Charney, Joe Orton (London, 1984) p. 87.
5. John Lahr, Prick Up Your Ears (London, 1978) p. 15.