APA (7th ed.) Citation

United States. Department of State. (1918). Proof of citizenship to be required of American seamen. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Department of State. Proof of Citizenship to Be Required of American Seamen. Washington: U.S. GPO, 1918.

MLA (9th ed.) Citation

United 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.