Hughes, G., & Bucknall, J. (2000). Poland: Complying with EU environmental legislation. World Bank.
Citazione stile Chigago Style (17a edizione)Hughes, Gordon, e Julia Bucknall. Poland: Complying with EU Environmental Legislation. Washington, D.C.: World Bank, 2000.
Citatione MLA (9a ed.)Hughes, Gordon, e Julia Bucknall. Poland: Complying with EU Environmental Legislation. World Bank, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.