Pavkov, Thomas W., author
McGraw-Hill, 2007
Buku Teks
Triton Prawira Budi, author
Andi , 2006
Buku Teks
Norusus, Marija, author
SPSS Inc, 1990
Buku Teks
Coakes, Sheridan J., author
John Wiley & Sons, 2001
Buku Teks
Singgih Santoso, author
Elex Media Komputindo, 2006
Buku Teks