Hughes, G., & Bucknall, J. (2000). Poland: Complying with EU environmental legislation. World Bank.
Lua i Stíl Chicago (17ú heag.)Hughes, Gordon, agus Julia Bucknall. Poland: Complying with EU Environmental Legislation. Washington, D.C.: World Bank, 2000.
Lua MLA (9ú heag.)Hughes, Gordon, agus Julia Bucknall. Poland: Complying with EU Environmental Legislation. World Bank, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.