Haemorrhagic Fever. The National Archives of United Kingdom. Public Health England (PHE). (原始内容存档于2014-07-14). Viral Haemorrhagic Fevers. World Health Organization
Elsevier Health Sciences. 2013: 279. ISBN 9780702051029. Imported Spotted Fevers. www.cdc.gov. April 2017 [28 October 2017]. (原始内容存档于2017-10-29) (美国英语).