APA (7th ed.) Citation

Civilian Conservation Corps (U.S.). (1940). Camp Life Arithmetic, Workbook No. 1, First Work in Numbers. [publisher not identified].

Chicago Style (17th ed.) Citation

Civilian Conservation Corps (U.S.). Camp Life Arithmetic, Workbook No. 1, First Work in Numbers. [Washington]: [publisher not identified], 1940.

MLA (9th ed.) Citation

Civilian Conservation Corps (U.S.). Camp Life Arithmetic, Workbook No. 1, First Work in Numbers. [publisher not identified], 1940.