APA (7th ed.) Citation

U.S. Customs Service. Office of Enforcement. (1992). Office of Enforcement: Internal controls. U.S. Customs Service.

Chicago Style (17th ed.) Citation

U.S. Customs Service. Office of Enforcement. Office of Enforcement: Internal Controls. [Washington, D.C.?]: U.S. Customs Service, 1992.

MLA (8th ed.) Citation

U.S. Customs Service. Office of Enforcement. Office of Enforcement: Internal Controls. U.S. Customs Service, 1992.