APA

United States, . (1973). Our Constitution and government: home study course; [for the helper]. Washington, D. C: The Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off.

Chicago

United States, . 1973. Our Constitution and government: home study course; [for the helper]. Washington, D. C: The Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off.

Harvard

United States, . (1973). Our Constitution and government: home study course; [for the helper]. Washington, D. C: The Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off.

MLA

United States, . Our Constitution and government: home study course; [for the helper]. Washington, D. C: The Service; for sale by the Supt. of Docs., U. S. Govt. Print. Off. 1973.