Zero Population Growth, Inc. (1988). USA by numbers: A statistical portrait of the United States. Zero Population Growth.
Chicago Style (17th ed.) CitationZero Population Growth, Inc. USA by Numbers: A Statistical Portrait of the United States. Washington, D.C.: Zero Population Growth, 1988.
MLA (9th ed.) CitationZero Population Growth, Inc. USA by Numbers: A Statistical Portrait of the United States. Zero Population Growth, 1988.
Warning: These citations may not always be 100% accurate.