Johnson, R. R. (1985). Elementary statistics for business. Duxbury Pr.
Cita Chicago (17th ed.)Johnson, Robert R. Elementary Statistics for Business. Boston, Mass: Duxbury Pr, 1985.
Cita MLA (9th ed.)Johnson, Robert R. Elementary Statistics for Business. Duxbury Pr, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.