Hughes, G., & Bucknall, J. (2000). Poland: Complying with EU environmental legislation. World Bank.
Chicago (17e ed.) BronvermeldingHughes, Gordon, en Julia Bucknall. Poland: Complying with EU Environmental Legislation. Washington, D.C.: World Bank, 2000.
MLA (9e ed.) BronvermeldingHughes, Gordon, en Julia Bucknall. Poland: Complying with EU Environmental Legislation. World Bank, 2000.