1. General Sir John Hackett, The Profession of Arms (London: Sidgwick & Jackson, 1983), 9, 202, first published in 1962 as the Lees-Knowles Lectures at Cambridge University.
2. The Profession of Arms in Postwar Canada, 1945–1970: Political Authority as a Military Problem
3. Colin S. Gray, "Defence Policy and the Military Profession: What Are Canada’s Soldiers to Do?" in Canadian Military Professionalism: The Search for Identity, Wellesley Paper 2, ed. R. B. Byers and Colin Gray ( Toronto: Canadian Institute of International Affairs , February 1973), 75-84.