Spiegel, M. R. (1975). Probability. McGraw-Hill.
Cita Chicago (17th ed.)Spiegel, Murray R. Probability. New York: McGraw-Hill, 1975.
Cita MLA (9th ed.)Spiegel, Murray R. Probability. McGraw-Hill, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.