Hughes, G., & Bucknall, J. (2000). Poland: Complying with EU environmental legislation. World Bank.
Cytowanie według stylu Chicago (wyd. 17)Hughes, Gordon, i Julia Bucknall. Poland: Complying with EU Environmental Legislation. Washington, D.C.: World Bank, 2000.
Cytowanie według stylu MLA (wyd. 9)Hughes, Gordon, i Julia Bucknall. Poland: Complying with EU Environmental Legislation. World Bank, 2000.