Maps.com (Firm) & ebrary, Inc. (1999). U.S. population change, 1950-1970. Maps.com.
Chicago-čujuhus (17. p.)Maps.com (Firm) juo Inc ebrary. U.S. Population Change, 1950-1970. [S.l.]: Maps.com, 1999.
MLA-čujuhus (9. p.)Maps.com (Firm) juo Inc ebrary. U.S. Population Change, 1950-1970. Maps.com, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.