Steen, L. A. (1997). Why numbers count: Quantitative literacy for tomorrow's america. College Entrance Examination Board.
Citazione stile Chigago Style (17a edizione)Steen, Lynn Arthur. Why Numbers Count: Quantitative Literacy for Tomorrow's America. New York: College Entrance Examination Board, 1997.
Citatione MLA (9a ed.)Steen, Lynn Arthur. Why Numbers Count: Quantitative Literacy for Tomorrow's America. College Entrance Examination Board, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.