APA ציטוט

Maps.com (Firm) & ebrary, Inc. (1999). U.S. population change, 1950-1970. Maps.com.

Chicago Style (17th ed.) Citation

Maps.com (Firm) and Inc ebrary. U.S. Population Change, 1950-1970. [S.l.]: Maps.com, 1999.

ציטוט MLA

Maps.com (Firm) and Inc ebrary. U.S. Population Change, 1950-1970. Maps.com, 1999.