- U.S. Food and Drug Administration (FDA)
- Consumer Healthcare Products Association (CHPA)
- U.S. Pharmacopeia (USP)
- United States - DDMAC Home Page
- United States - FDA - CDER - Guidance Documents
- United States - FDA - CDER Home Page
- United States - National Archives and Records Administration - Code of Federal Regulations
- United States - National Archives and Records Administration - Office of the Federal Register
- United States - US Department of Health
- United States - US Superintendant of Documents