Yaglom, A. M., Yaglom, I. M., McCawley, J., & Gordon, B. (1987). Challenging methematical problems with elementary solutions. New York: Dover publications, Inc..
Παραπομπή Chicago StyleYaglom, A. M., I. M. Yaglom, James McCawley, and Basil Gordon. Challenging Methematical Problems With Elementary Solutions. New York: Dover publications, Inc., 1987.
Παραπομπή MLAYaglom, A. M., I. M. Yaglom, James McCawley, and Basil Gordon. Challenging Methematical Problems With Elementary Solutions. New York: Dover publications, Inc., 1987.
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