Não informado. (2001). Zoonoses surveillance. Center for Disease Control, Department of Health, Education Welfare.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Zoonoses Surveillance. Atlanta, Ga: Center for Disease Control, Department of Health, Education Welfare, 2001.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Zoonoses Surveillance. Center for Disease Control, Department of Health, Education Welfare, 2001.
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