Nickell, S. (1999). Product Markets and Labour Markets.
Lua i Stíl Chicago (17ú heag.)Nickell, S. Product Markets and Labour Markets. 1999.
Lua MLA (9ú heag.)Nickell, S. Product Markets and Labour Markets. 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.