Say, J. B., & Richter, J. (1967). Letters to Mr. Malthus on several subjects of political economy and on the cause of the stagnation of commerce, to which is added a catechism of political economy: Or, familiar conversations on the manner in which wealth is produced, distributed, and consumed in society. A. M. Kelley.

Say, Jean Baptiste, and John Richter. Letters to Mr. Malthus on Several Subjects of Political Economy and on the Cause of the Stagnation of Commerce, to Which Is Added a Catechism of Political Economy: Or, Familiar Conversations on the Manner in Which Wealth Is Produced, Distributed, and Consumed in Society. New York: A. M. Kelley, 1967.

Say, Jean Baptiste, and John Richter. Letters to Mr. Malthus on Several Subjects of Political Economy and on the Cause of the Stagnation of Commerce, to Which Is Added a Catechism of Political Economy: Or, Familiar Conversations on the Manner in Which Wealth Is Produced, Distributed, and Consumed in Society. A. M. Kelley, 1967.