APA (7th ed.) Citation

Influenza (Flu) ([Archived version].). U.S. Department of Health & Human Services.

Chicago Style (17th ed.) Citation

Influenza (Flu). [Archived version]. Washington, D.C.: U.S. Department of Health & Human Services.

MLA (9th ed.) Citation

Influenza (Flu). [Archived version]. U.S. Department of Health & Human Services.

Warning: These citations may not always be 100% accurate.