^‘TURNBULL, Ven. John William’, Who Was Who, A & C Black, an imprint of Bloomsbury Publishing plc, 1920–2016; online edn, Oxford University Press, 2014 ; online edn, April 2014
accessed 25 March 2017
^‘TURNBULL, Ven. John William’, Who Was Who, A & C Black, an imprint of Bloomsbury Publishing plc, 1920–2016; online edn, Oxford University Press, 2014 ; online edn, April 2014
accessed 25 March 2017