Williams, C. G. (1970). Labor economics. Wiley.
Lua i Stíl Chicago (17ú heag.)Williams, Clifford Glyn. Labor Economics. New York: Wiley, 1970.
Lua MLA (9ú heag.)Williams, Clifford Glyn. Labor Economics. Wiley, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.