DAVIS LANCE E. (1961). AMERICAN ECONOMIC HISTORY: THE DEVELOPMENT OF A NATIONAL ECONOMY. RICHARD D.IRWIN INC.
Lua i Stíl Chicago (17ú heag.)DAVIS LANCE E. AMERICAN ECONOMIC HISTORY: THE DEVELOPMENT OF A NATIONAL ECONOMY. ILLINOIS: RICHARD D.IRWIN INC, 1961.
Lua MLA (9ú heag.)DAVIS LANCE E. AMERICAN ECONOMIC HISTORY: THE DEVELOPMENT OF A NATIONAL ECONOMY. RICHARD D.IRWIN INC, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.