Howitt, D., & Cramer, D. (1997). A guide to computing statistics with SPSS for Windows. Prentice Hall.
Citazione stile Chigago Style (17a edizione)Howitt, Dennis, e Duncan Cramer. A Guide to Computing Statistics with SPSS for Windows. London: Prentice Hall, 1997.
Citatione MLA (9a ed.)Howitt, Dennis, e Duncan Cramer. A Guide to Computing Statistics with SPSS for Windows. Prentice Hall, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.