Gardner, M. (1969). The unexpected hanging: And other mathematical diversions. New York: Simon and Schuster.
Παραπομπή Chicago StyleGardner, Martin. The Unexpected Hanging: And Other Mathematical Diversions. New York: Simon and Schuster, 1969.
Παραπομπή MLAGardner, Martin. The Unexpected Hanging: And Other Mathematical Diversions. New York: Simon and Schuster, 1969.
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