APA (7th ed.) Citation

United States. Office of Civilian Defense. (1942). Block Leaders' Alert, Block Plan for Civilian War Services. [s.n.].

Chicago Style (17th ed.) Citation

United States. Office of Civilian Defense. Block Leaders' Alert, Block Plan for Civilian War Services. [Washington]: [s.n.], 1942.

MLA (9th ed.) Citation

United States. Office of Civilian Defense. Block Leaders' Alert, Block Plan for Civilian War Services. [s.n.], 1942.