Shearman, T. G. (1898). Natural taxation: An inquiry into the practicability, justice and effects of a scientific and natural method of taxation (New and enl. ed., 3d thousand.). Doubleday & McClure Co..

Shearman, Thomas Gaskell. Natural Taxation: An Inquiry into the Practicability, Justice and Effects of a Scientific and Natural Method of Taxation. New and enl. ed., 3d thousand. New York: Doubleday & McClure Co., 1898.

Shearman, Thomas Gaskell. Natural Taxation: An Inquiry into the Practicability, Justice and Effects of a Scientific and Natural Method of Taxation. New and enl. ed., 3d thousand. Doubleday & McClure Co., 1898.