Kish, Leslie
John Wiley & Sons, 1965
Buku Teks
Scheaffer, Richard L.
Brooks/Cole Cengage Learning, 2012
Buku Teks
Scheaffer, Richard L.
Duxbury , 1990 Press
Buku Teks
Chaudhuri, Arijit
Chapman and Hall/CRC, 2005
Buku Teks
Cassel, Claes-Magnus
John Wiley & Sons, 1977
Buku Teks