APA (7th ed.) Citation

United States. Department of Commerce. (1939). Customs Ports Authorized to Issue Marine Documents. [s.n.].

Chicago Style (17th ed.) Citation

United States. Department of Commerce. Customs Ports Authorized to Issue Marine Documents. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Department of Commerce. Customs Ports Authorized to Issue Marine Documents. [s.n.], 1939.

Warning: These citations may not always be 100% accurate.