Nadel, Barbara (2 May 2012). "Blog entry". International Crime Authors Reality Check. Archived from the original on 2 May 2012. Retrieved 15 July 2012.
Nadel, Barbara (19 April 2015). "Blog entry". International Crime Authors Reality Check. Archived from the original on 19 April 2015. Retrieved 14 April 2015.
quercusbooks.co.uk
"Blog entry". Quercus. 24 January 2011. Archived from the original on 19 July 2011. Retrieved 21 June 2011.
Nadel, Barbara (2 May 2012). "Blog entry". International Crime Authors Reality Check. Archived from the original on 2 May 2012. Retrieved 15 July 2012.
Nadel, Barbara (19 April 2015). "Blog entry". International Crime Authors Reality Check. Archived from the original on 19 April 2015. Retrieved 14 April 2015.
"Blog entry". Quercus. 24 January 2011. Archived from the original on 19 July 2011. Retrieved 21 June 2011.