Rykwert, Joseph (12 January 2001). "Sir Denys Lasdun obituary". The Independent. London. Archived from the original on 30 September 2007. Retrieved 22 January 2007.
nationaltheatre.org.uk
nationaltheatre.org.uk
"Home page". The National Theatre. Archived from the original on 25 May 2020. Retrieved 29 November 2017. Welcome to the National Theatre
Rykwert, Joseph (12 January 2001). "Sir Denys Lasdun obituary". The Independent. London. Archived from the original on 30 September 2007. Retrieved 22 January 2007.