Não informado. (2004). Animal and public health reports. Swiss Federal Veterinary Office.
Chicago-referens (17:e uppl.)Não informado. Animal and Public Health Reports. Bern: Swiss Federal Veterinary Office, 2004.
MLA-referens (8:e uppl.)Não informado. Animal and Public Health Reports. Swiss Federal Veterinary Office, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.