APA (7th ed.) Citation

U.S. Customs Service. (1988). Narcotic identification manual (Rev. 1988.). Dept. of the Treasury, U.S. Customs Service.

Chicago Style (17th ed.) Citation

U.S. Customs Service. Narcotic Identification Manual. Rev. 1988. Washington, D.C.: Dept. of the Treasury, U.S. Customs Service, 1988.

MLA (9th ed.) Citation

U.S. Customs Service. Narcotic Identification Manual. Rev. 1988. Dept. of the Treasury, U.S. Customs Service, 1988.