Wonnacott, T. H., & Wonnacott, R. J. (1990). Introductory statistics for business and Economics (4th.ed.). John Wiley & sons.
Cita Chicago (17th ed.)Wonnacott, Thomas H., i Ronald J. Wonnacott. Introductory Statistics for Business and Economics. 4th.ed. New York: John Wiley & sons, 1990.
Cita MLA (9th ed.)Wonnacott, Thomas H., i Ronald J. Wonnacott. Introductory Statistics for Business and Economics. 4th.ed. John Wiley & sons, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.