United States. Office of the Provost Marshal General. (1918). Selective Service regulations.
Chicago Style (17th ed.) CitationUnited States. Office of the Provost Marshal General. Selective Service Regulations. Washington, D. C, 1918.
MLA (8th ed.) CitationUnited States. Office of the Provost Marshal General. Selective Service Regulations. 1918.
Warning: These citations may not always be 100% accurate.