APA (7th ed.) Citation

U.S. Customs Service. Office of Public Affairs. (1995). The Oklahoma City tragedy. US Customs Service.

Chicago Style (17th ed.) Citation

U.S. Customs Service. Office of Public Affairs. The Oklahoma City Tragedy. [Washington, D.C.?]: US Customs Service, 1995.

MLA (9th ed.) Citation

U.S. Customs Service. Office of Public Affairs. The Oklahoma City Tragedy. US Customs Service, 1995.