Harbison, F. H. (1973). Human resources as the wealth of nations. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Harbison, Frederick Harris. Human Resources as the Wealth of Nations. New York: Oxford University Press, 1973.
Lua MLA (8ú heag.)Harbison, Frederick Harris. Human Resources as the Wealth of Nations. Oxford University Press, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.