Encyclopedia of statistical sciences Vol.9
Samuel Kotz, Norman L. Johnson, editors-in-chief
John Wiley & Sons, Inc., 1982
Buku Referensi
Progress in surface science; Vol.9
edited by Syney G. Davidson
Pergamon Press, 1981
Buku Teks
Shah, Giraraj
Encyclopedia of crime, police and judicial system : a continuing series, Vol.9. Police and society.
Anmol Publications PVT. Ltd., 2000
Buku Referensi