(1991). Discrete mathematics across the curriculum, K-12: 1991 yearbook. Reston, Virginia: National Council of Teachers of Mathematics.
استشهاد بنمط شيكاغوDiscrete Mathematics Across the Curriculum, K-12: 1991 Yearbook. Reston, Virginia: National Council of Teachers of Mathematics, 1991.
MLA استشهادDiscrete Mathematics Across the Curriculum, K-12: 1991 Yearbook. Reston, Virginia: National Council of Teachers of Mathematics, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.