Wetherill, G. Barrie
Chapman & Hall, 1972
Buku Teks
Mosteller, Frederick, author
Addison-Wesley, 1972
Buku Teks
Scheaffer, Richard L., author
Duxbury Press , 1995
Buku Teks
Montgomery, Douglas C., author
John Wiley & Sons, 2004
Buku Teks
Blum, Julius R., author
W.B. Saunders, 1972
Buku Teks