DWASS, M. (1967). First steps in probability. McGraw-Hill.
Cita Chicago (17th ed.)DWASS, Meyer. First Steps in Probability. New York: McGraw-Hill, 1967.
Cita MLA (9th ed.)DWASS, Meyer. First Steps in Probability. McGraw-Hill, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.