Cita APA

Royal Society for the Protection of Birds. (1981). Birds in need of special protection in Europe. Strasburg: Council of Europe.

Citación estilo Chicago

Royal Society for the Protection of Birds. Birds in Need of Special Protection in Europe. Strasburg: Council of Europe, 1981.

Cita MLA

Royal Society for the Protection of Birds. Birds in Need of Special Protection in Europe. Strasburg: Council of Europe, 1981.