Ekelund, R. B., & Hébert, R. F. (1990). A history of economic theory and method (3rd ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Ekelund, Robert B., agus Robert F. Hébert. A History of Economic Theory and Method. 3rd ed. New York: McGraw-Hill, 1990.
Lua MLA (8ú heag.)Ekelund, Robert B., agus Robert F. Hébert. A History of Economic Theory and Method. 3rd ed. McGraw-Hill, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.