Clawson, C. C. (1994). The mathematical traveler: Exploring the grand history of numbers. Perseus.
Cita Chicago (17th ed.)Clawson, Calvin C. The Mathematical Traveler: Exploring the Grand History of Numbers. Cambridge: Perseus, 1994.
Cita MLA (9th ed.)Clawson, Calvin C. The Mathematical Traveler: Exploring the Grand History of Numbers. Perseus, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.