Não informado. (2001). Zoonoses Surveillance. Center for Disease Control, Department of Health, Education Welfare.
Chicago-viite (17. p.)Não informado. Zoonoses Surveillance. Atlanta, Ga: Center for Disease Control, Department of Health, Education Welfare, 2001.
MLA-viite (8. p.)Não informado. Zoonoses Surveillance. Center for Disease Control, Department of Health, Education Welfare, 2001.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.