Chakrabarti, Shami; et al. (5 March 2012). "Secrets and scrutiny". The Guardian. London. Archived from the original on 2 January 2014. Retrieved 9 April 2012.
Chakrabarti, Shami; et al. (5 March 2012). "Secrets and scrutiny". The Guardian. London. Archived from the original on 2 January 2014. Retrieved 9 April 2012.