APA

United States, . (1979). Economic study of Puerto Rico: report to the President. [Washington]: The Dept. : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

Chicago

United States, . 1979. Economic study of Puerto Rico: report to the President. [Washington]: The Dept. : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

Harvard

United States, . (1979). Economic study of Puerto Rico: report to the President. [Washington]: The Dept. : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

MLA

United States, . Economic study of Puerto Rico: report to the President. [Washington]: The Dept. : for sale by the Supt. of Docs., U.S. Govt. Print. Off. 1979.