Nickell, S. (1985). Benefits and Limitations of Panel Data: Comment.
Lua i Stíl Chicago (17ú heag.)Nickell, S. Benefits and Limitations of Panel Data: Comment. 1985.
Lua MLA (9ú heag.)Nickell, S. Benefits and Limitations of Panel Data: Comment. 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.