APA

(1972). Population and the American future. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.

Chicago

1972. Population and the American future. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.

Harvard

(1972). Population and the American future. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off.

MLA

Population and the American future. Washington: For sale by the Supt. of Docs., U.S. Govt. Print. Off. 1972.