Ekelund, R. B., Furubotn, E. G., & Gramm, P. (1972). The evolution of modern demand theory: A collection of essays. Lexington Books.
Lua i Stíl Chicago (17ú heag.)Ekelund, Robert B., Eirik Grundtvig Furubotn, agus Phil Gramm. The Evolution of Modern Demand Theory: A Collection of Essays. Lexington, Mass.: Lexington Books, 1972.
Lua MLA (8ú heag.)Ekelund, Robert B., et al. The Evolution of Modern Demand Theory: A Collection of Essays. Lexington Books, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.