Fontes Imagem cortesia da Baker Library Historical Collections; Dorothea D. Reeves, "The Jost Amman Print", em The Business History Review, Vol. 33, No. 2; Donald T. Clark, "Jost Amman's Allegory of Trade-or, the World of Business in the Sixteenth Century", em The World of Business, Vol. IV (Simon & Schuster, 1962)
