Gaya APA
Norusis, M.
(2011).
IBM SPSS Statistics 19 Guide to Data Analysis
.
Prentice Hall, 2011:
Pearson International.
Gaya MLA
Norusis, Marija.
"IBM SPSS Statistics 19 Guide to Data Analysis".
Prentice Hall, 2011:
Pearson International,
2011.
.