Ashenfelter, O. (1999). Labor economics. Worth.
Lua i Stíl Chicago (17ú heag.)Ashenfelter, Orley. Labor Economics. New York: Worth, 1999.
Lua MLA (9ú heag.)Ashenfelter, Orley. Labor Economics. Worth, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.