The following are some additional reading resources that you may find useful:
Research Methods Resource: Heiman, G. (2001). Research Methods in Psychology (3rd ed.). Cengage Learning.
Statistics Resource: Aron, A., Aron, E., & Coups, E. (2005). Statistics for Psychology (4th ed.). Pearson.
SPSS and Statistics Resource: Cronk, B. (2011). How to use SPSS (7th ed.). Pyrczak.