Lesh, R. A., & Doerr, H. M. (2003). Beyond constructivism. Models and modeling perspectives on mathematics problem solving, learning and teaching. Lawrence Erlbaum Associates.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lesh, Richard A., و Helen M. Doerr. Beyond Constructivism. Models and Modeling Perspectives on Mathematics Problem Solving, Learning and Teaching. Mahwah: Lawrence Erlbaum Associates, 2003.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Lesh, Richard A., و Helen M. Doerr. Beyond Constructivism. Models and Modeling Perspectives on Mathematics Problem Solving, Learning and Teaching. Lawrence Erlbaum Associates, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.