^"David Hockney: Paintings". Archived from the original on 2017-01-18. Retrieved 2017-01-16."David Hockney: Paintings". Archived from the original on 2017-01-18. Retrieved 2017-01-16.
^"Notices Under the Trustee Act, 1925, s. 27". The London Gazette. 29 August 1968. p. 9487. Retrieved 7 May 2013.