Fuchs, V. R. (1964). Productivity trends in the goods and service sectors, 1929-61: A preliminary survey. National Bureau of Economic Research.
Lua i Stíl Chicago (17ú heag.)Fuchs, Victor Robert. Productivity Trends in the Goods and Service Sectors, 1929-61: A Preliminary Survey. [New York]: National Bureau of Economic Research, 1964.
Lua MLA (9ú heag.)Fuchs, Victor Robert. Productivity Trends in the Goods and Service Sectors, 1929-61: A Preliminary Survey. National Bureau of Economic Research, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.