Dancing Fish and Ammonites: A Memoirfirst published October 10th 2013; Original Title: Ammonites and Leaping Fish: A Life in Time at goodreads.com, Accessed 24 April 2018
(Carnegie Winner 1973). Living Archive: Celebrating the Carnegie and Greenaway Winners. CILIP. Archived copy of page at carnegiegreenaway.org.uk, Retrieved 17 August 2012.