APA

United States, . (1967). Planning for the later years. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.

Chicago

United States, . 1967. Planning for the later years. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.

Harvard

United States, . (1967). Planning for the later years. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.

MLA

United States, . Planning for the later years. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off. 1967.