United States. Department of State. (1918). Proof of citizenship to be required of American seamen. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Department of State. Proof of Citizenship to Be Required of American Seamen. Washington: U.S. GPO, 1918.
MLA (9th ed.) CitationUnited States. Department of State. Proof of Citizenship to Be Required of American Seamen. U.S. GPO, 1918.
Warning: These citations may not always be 100% accurate.