CRAWLEY, M. (2015). STATISTICS (2ND ED.). WILEY.
Cita Chicago (17th ed.)CRAWLEY, MICHAEL.J. STATISTICS. 2ND ED. UNITED KINGDOM: WILEY, 2015.
Cita MLA (9th ed.)CRAWLEY, MICHAEL.J. STATISTICS. 2ND ED. WILEY, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.