Grosvenor House Publishing Limited, October 2020
Praeger, August 1997
VDM Verlag, September 2011
David Rees, December 2023
CSIRO Publishing, May 2007
Gwasg Prifysgol Cymru, September 1993
Independently Published, January 2021
Wiley-Blackwell, April 2022
Bloomsbury Publishing PLC, March 2005
Routledge, October 2023