Palmer, A.L.P.P.P.M.; Palmer, M.; Tunstall, J.; Tunstall, R.P.S.J. (2006). Media Moguls. Taylor & Francis. p. 73. ISBN9781134937349. Archived from the original on 15 December 2021. Retrieved 23 September 2020.
Palmer, A.L.P.P.P.M.; Palmer, M.; Tunstall, J.; Tunstall, R.P.S.J. (2006). Media Moguls. Taylor & Francis. p. 73. ISBN9781134937349. Archived from the original on 15 December 2021. Retrieved 23 September 2020.