Findley, W., & Caldwell, J. (2007). Observations on The two sons of oil: Containing a vindication of the American constitutions, and defending the blessings of religious liberty and toleration, against the illiberal strictures of the Rev. Samuel B. Wylie. Liberty Fund.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Findley, William, و John Caldwell. Observations on The Two Sons of Oil: Containing a Vindication of the American Constitutions, and Defending the Blessings of Religious Liberty and Toleration, Against the Illiberal Strictures of the Rev. Samuel B. Wylie. Indianapolis: Liberty Fund, 2007.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Findley, William, و John Caldwell. Observations on The Two Sons of Oil: Containing a Vindication of the American Constitutions, and Defending the Blessings of Religious Liberty and Toleration, Against the Illiberal Strictures of the Rev. Samuel B. Wylie. Liberty Fund, 2007.