Clawson, C. (2004). Mathemtical mysteries. Viva.
Cita Chicago (17th ed.)Clawson, Calvin. Mathemtical Mysteries. New Delhi: Viva, 2004.
Cita MLA (9th ed.)Clawson, Calvin. Mathemtical Mysteries. Viva, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.