Bond, Edward (18 November 1975). "The Fool". Peter Gill, playwright and theatre director. Archived from the original on 11 September 2010. Retrieved 23 April 2008.
"John Boswall". Theatricalia.com. Retrieved 4 January 2019.
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Bond, Edward (18 November 1975). "The Fool". Peter Gill, playwright and theatre director. Archived from the original on 11 September 2010. Retrieved 23 April 2008.