Carver, R. H., & Nash, J. G. (2012). Doing data analysis with SPSS version 18. Cengage Learning India Pvivate Limited.
Dyfyniad Arddull ChicagoCarver, Robert H., and Jane Gradwohl Nash. Doing Data Analysis with SPSS Version 18. New Delhi: Cengage Learning India Pvivate Limited, 2012.
Dyfyniad MLACarver, Robert H., and Jane Gradwohl Nash. Doing Data Analysis with SPSS Version 18. Cengage Learning India Pvivate Limited, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.