Não informado. (1990). European Journal of Companion Animal Practice. Federation of European Companion Animal Veterinary Association.
Chicago-referens (17:e uppl.)Não informado. European Journal of Companion Animal Practice. Paris: Federation of European Companion Animal Veterinary Association, 1990.
MLA-referens (8:e uppl.)Não informado. European Journal of Companion Animal Practice. Federation of European Companion Animal Veterinary Association, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.