Northcote-Green, James
CRC Press, Taylor & Francis, 2007
Buku Teks SO
edited by Clark W. Bullard and Porter J. Womeldorff
Pergamon, 1984
Buku Teks SO
Nicholas D. Adams, Terry W. Brown, Rowland V. D. Firth, Laura P. Misenheimer, editor
McGraw-Hill, 1996
Buku Referensi
Barwell, F.T.
Pergamon Press, 1983
Buku Teks
Olsson, Gustaf
Prentice-Hall, 1992
Buku Teks SO