Marks, Trevor E.
William Ernest, 1992
Buku Teks SO
Whitfield, John
EPA Press, 1995
Buku Referensi
Jenkins, Brian David
Blackwell Scientific Publications, 1991
Buku Teks SO
UHP Press, 2012
Buku Teks
Skrotzki, Bernhardt G.A.
McGraw-Hill, 1954
Buku Teks SO