Spellman, Frank R.
CRC Press, 2009
Buku Referensi
Royal Society of chemistry, 2000
Buku Teks
Casey , T. J.
John Wiley & Sons, 1996
Buku Teks
Published for the Water Research Centre, Stevenage Laboratory by Horwood , 1981
Buku Teks
by C.P. Leslie Grady, Jr., Glen T. Daigger, Nancy G. Love and Carlos D.M. Filipe
CRC Press, 2014
Buku Teks