APA

United States, . (1968). From sea to shining sea: a report on the American environment, our natural heritage. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Chicago

United States, . 1968. From sea to shining sea: a report on the American environment, our natural heritage. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

Harvard

United States, . (1968). From sea to shining sea: a report on the American environment, our natural heritage. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.].

MLA

United States, . From sea to shining sea: a report on the American environment, our natural heritage. Washington: [For sale by the Supt. of Docs., U.S. Govt. Print. Off.]. 1968.