Sobel, R. (1980). The worldly economists. The Free Press.
Lua i Stíl Chicago (17ú heag.)Sobel, Robert. The Worldly Economists. The Free Press, 1980.
Lua MLA (9ú heag.)Sobel, Robert. The Worldly Economists. The Free Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.