APA

Real Academia Española, United States, . (1997). The Black popoulation in the United States. Washington, D.C: U.S. Dept. of Commerce, Bureau of the Census.

Chicago

Real Academia Española, United States, . 1997. The Black popoulation in the United States. Washington, D.C: U.S. Dept. of Commerce, Bureau of the Census.

Harvard

Real Academia Española, United States, . (1997). The Black popoulation in the United States. Washington, D.C: U.S. Dept. of Commerce, Bureau of the Census.

MLA

Real Academia Española, United States, . The Black popoulation in the United States. Washington, D.C: U.S. Dept. of Commerce, Bureau of the Census. 1997.