Ely, R. T., & Wicker, G. R. (1917). Elementary principles of economics: Together with a short sketch of economic history (Rev.). Macmillan.
Lua i Stíl Chicago (17ú heag.)Ely, Richard Theodore, agus George Ray Wicker. Elementary Principles of Economics: Together with a Short Sketch of Economic History. Rev. New York ; London: Macmillan, 1917.
Lua MLA (8ú heag.)Ely, Richard Theodore, agus George Ray Wicker. Elementary Principles of Economics: Together with a Short Sketch of Economic History. Rev. Macmillan, 1917.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.