"A Treatise On Political Economy". Book by Jean-Baptiste Say. Translated from the Fourth Edition of the French by C.R. Prinsep, M.A. With Notes by the Translator. (Sixth American Edition), Chapter VI, p. 323, 1832.
Mark Hopkins (1909). “Evidences of Christianity: Lectures Before the Lowell Institute, Revised as a Text Book, with a Supplementary Chapter Considering Some Attacks on the Critical School, the Corroborative Evidence of Recently Discovered Manuscripts, Etc., and the Testimony of Jesus on His Trial”