United States. Bureau of Alcohol, Tobacco, and Firearms. Firearms and Explosives Operations Branch. (2015). ATF guidebook: Importation & verification of firearms, ammunition, and implements of war. U.S. Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives.
Chicago Style (17th ed.) CitationUnited States. Bureau of Alcohol, Tobacco, and Firearms. Firearms and Explosives Operations Branch. ATF Guidebook: Importation & Verification of Firearms, Ammunition, and Implements of War. [Washington, D.C.]: U.S. Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, 2015.
MLA (9th ed.) CitationUnited States. Bureau of Alcohol, Tobacco, and Firearms. Firearms and Explosives Operations Branch. ATF Guidebook: Importation & Verification of Firearms, Ammunition, and Implements of War. U.S. Department of Justice, Bureau of Alcohol, Tobacco, Firearms and Explosives, 2015.