United States. Bureau of Customs. (1937). Customs regulations of the United States prescribed for the instruction and guidance of customs officers. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Customs. Customs Regulations of the United States Prescribed for the Instruction and Guidance of Customs Officers. [Washington]: [s.n.], 1937.
MLA (9th ed.) CitationUnited States. Bureau of Customs. Customs Regulations of the United States Prescribed for the Instruction and Guidance of Customs Officers. [s.n.], 1937.
Warning: These citations may not always be 100% accurate.