References
- Hamer , Robert M. 1981 . “Papers That Evaluate Computer Programs,” . The American Statistician , 35 : 264
- Hull , Hadlai C. and Nie , Norman H. 1981 . SPSS Update 7–9 , New York : McGraw-Hill .
- Nie , Norman H. 1980 . SCSS: A User's Guide to the SCSS Conversational System , New York : McGraw-Hill .
- norušis , Marija J. 1982 . SPSS Introductory Guide , New York : McGraw-Hill .
- Velleman , Paul F. and Welsch , Roy E. 1981 . “Efficient Computing of Regression Diagnostics,” . The American Statistician , 35 : 234 – 241 .