Sir William Petty (1769). “Tracts, Chiefly Relating to Ireland: Containing: 1. A Treatise of Taxes and Contributions. II. Essays in Political Arithmetic. III. The Political Anatomy of Ireland”, p.79
"Strengthening our Security by Adhering to our Values and Laws". John O. Brennan's Speech at Harvard Law School in Cambridge, Massachusetts, obamawhitehouse.archives.gov. September 16, 2011.