National Research Council (U.S.). Mathematical Sciences Education Board & Bass, H. (1993). Measuring what counts: A policy brief. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Research Council (U.S.). Mathematical Sciences Education Board و Hyman Bass. Measuring What Counts: A Policy Brief. Washington, D.C.: National Academy Press, 1993.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)National Research Council (U.S.). Mathematical Sciences Education Board و Hyman Bass. Measuring What Counts: A Policy Brief. National Academy Press, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.