APA (7th ed.) Zitazioa

Keinhorst, J. (2003). Environmental-policy co-operation with central and eastern Europe.

Chicago Style (17th ed.) Zitazioa

Keinhorst, Jurgen. Environmental-policy Co-operation with Central and Eastern Europe. 2003.

MLA (9th ed.) Zitazioa

Keinhorst, Jurgen. Environmental-policy Co-operation with Central and Eastern Europe. 2003.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.