P.-St, A. (1887) “J. B. Clark, the Philosophy of Wealth. Economic Principles newly formulated. Boston, Ginn & Co. 1886. (235 S.) (Doll. 1,10)”., Nationaløkonomisk Tidsskrift, 5. Tilgængelig hos: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/65307 (Set: 5 december 2025).