Code of federal regulations.
21,
Food and drugs.
APA Citation
United States. Office of the Federal Register. Code of federal regulations. Washington: Office of the Federal Register, National Archives and Records Service, General Services Administration .
MLA Citation
United States. Office of the Federal Register. Code of Federal Regulations. Washington: Office of the Federal Register, National Archives and Records Service, General Services Administration ,
Warning: These citations may not always be complete (especially for serials).