Richard Cecil, Josiah PRATT (the Elder.) (1854). “Remains of the Rev. Richard Cecil ... With a view of his character, by the Rev. Josiah Pratt ... To which is prefixed a memoir of his life signed: J. Cecil . Tenth edition”, p.177
Dalai Lama, Anne Benson, Fabien Ouaki (2016). “Imagine All the People: A Conversation with the Dalai Lama on Money, Politics, and Life As It Could Be”, p.48, Simon and Schuster
Winston Churchill's statement as President of the Air Council in War Office Departmental Minute (the original document is in the collection of Churchill Papers 16/16 at the Churchill Archives Centre in Cambridge), May 12, 1919.