Dowdy, S. M., Wearden, S., & Chilko, D. M. (2004). Statistics for research: Shirley Dowdy, Stanley Weardon, Daniel Chilko (3rd ed.). Wiley-Interscience.
Cita Chicago (17th ed.)Dowdy, S. M., Stanley Wearden, i Daniel M. Chilko. Statistics for Research: Shirley Dowdy, Stanley Weardon, Daniel Chilko. 3rd ed. Hoboken, N.J.: Wiley-Interscience, 2004.
Cita MLA (8th ed.)Dowdy, S. M., et al. Statistics for Research: Shirley Dowdy, Stanley Weardon, Daniel Chilko. 3rd ed. Wiley-Interscience, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.