United States. Office of Civilian Defense. (1943). Regulations No. 4: United States Citizen Corps Service. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Office of Civilian Defense. Regulations No. 4: United States Citizen Corps Service. [Washington]: [s.n.], 1943.
MLA (8th ed.) CitationUnited States. Office of Civilian Defense. Regulations No. 4: United States Citizen Corps Service. [s.n.], 1943.
Warning: These citations may not always be 100% accurate.