(原始内容存档于2022-04-10). Questions and Answers about Ebola Hemorrhagic Fever. Centers for Disease Control andPrevention. 2009-03-25 [2009-05-31]. (原始内容存档于2009-05-06)
[2020-07-30]. (原始内容存档于2016-07-03). Occupational noise exposure - 1910.95. The Occupational Safety and Health Administration. [2020-07-30]. (原始内容存档于2015-04-02)