Nickell, S. (1979). Education and Lifetime Patterns of Unemployment.
Lua i Stíl Chicago (17ú heag.)Nickell, S. Education and Lifetime Patterns of Unemployment. 1979.
Lua MLA (9ú heag.)Nickell, S. Education and Lifetime Patterns of Unemployment. 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.