APA (7th ed.) Citation

U.S. Customs Service. Office of Regulations & Rulings, U.S. Customs Service. Classification and Value Division, & U.S. Customs Service. New York Seaport. Commodity classification under the harmonized system. Dept. of the Treasury, U.S. Customs Service.

Chicago Style (17th ed.) Citation

U.S. Customs Service. Office of Regulations & Rulings, U.S. Customs Service. Classification and Value Division, and U.S. Customs Service. New York Seaport. Commodity Classification Under the Harmonized System. [Washington, D.C.?]: Dept. of the Treasury, U.S. Customs Service.

MLA (9th ed.) Citation

U.S. Customs Service. Office of Regulations & Rulings, et al. Commodity Classification Under the Harmonized System. Dept. of the Treasury, U.S. Customs Service.