Levin, R. I., & Rubin, D. S. (1998). Statistics for management (7th ed.). Prentice Hall International.
Cita Chicago (17th ed.)Levin, Richard I., i David S. Rubin. Statistics for Management. 7th ed. Upper Saddle River, N.J: Prentice Hall International, 1998.
Cita MLA (9th ed.)Levin, Richard I., i David S. Rubin. Statistics for Management. 7th ed. Prentice Hall International, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.