- Paulos, J. A. (1998).
*Once upon a number: The hidden mathematical logic of stories*. New York, NY: Basic Books.

- Paulos, John Allen. 1998.
*Once upon a number: the hidden mathematical logic of stories*. New York, NY: Basic Books.

- PAULOS, J. A. (1998).
*Once upon a number: the hidden mathematical logic of stories*. New York, NY, Basic Books.

- Paulos, John A.
*Once Upon a Number: The Hidden Mathematical Logic of Stories*. New York, NY: Basic Books, 1998. Print.

- Paulos, John Allen.
*Once Upon a Number: The Hidden Mathematical Logic of Stories*. New York, NY: Basic Books, 1998.

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