Keinhorst, J. (2003). Environmental-policy co-operation with central and eastern Europe.
Chicago-čujuhus (17. p.)Keinhorst, Jurgen. Environmental-policy Co-operation with Central and Eastern Europe. 2003.
MLA-čujuhus (9. p.)Keinhorst, Jurgen. Environmental-policy Co-operation with Central and Eastern Europe. 2003.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.