Rachel Held Evans (2012). “A Year of Biblical Womanhood: How a Liberated Woman Found Herself Sitting on Her Roof, Covering Her Head, and Calling Her Husband 'Master'”, p.26, Thomas Nelson Inc
William Poundstone (2010). “Fortune's Formula: The Untold Story of the Scientific Betting System That Beat the Casinos and Wall Street”, p.102, Macmillan