Steen, L. A. (1997). Why numbers count: Quantitative literacy for tomorrow's america. College Entrance Examination Board.
Lua i Stíl Chicago (17ú heag.)Steen, Lynn Arthur. Why Numbers Count: Quantitative Literacy for Tomorrow's America. New York: College Entrance Examination Board, 1997.
Lua MLA (9ú heag.)Steen, Lynn Arthur. Why Numbers Count: Quantitative Literacy for Tomorrow's America. College Entrance Examination Board, 1997.
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