APA (7th ed.) Citation

United States Civil Service Commission. (1940). Official register of the United States, 1940, persons occupying administrative and supervisory positions in the legislative, executive, and judicial branches of Federal Government, and of District of Columbia, as of May 1, 1940. [s.n.].

Chicago Style (17th ed.) Citation

United States Civil Service Commission. Official Register of the United States, 1940, Persons Occupying Administrative and Supervisory Positions in the Legislative, Executive, and Judicial Branches of Federal Government, and of District of Columbia, as of May 1, 1940. [Washington]: [s.n.], 1940.

MLA (9th ed.) Citation

United States Civil Service Commission. Official Register of the United States, 1940, Persons Occupying Administrative and Supervisory Positions in the Legislative, Executive, and Judicial Branches of Federal Government, and of District of Columbia, as of May 1, 1940. [s.n.], 1940.