Palin, G.R.
Pergamon Press, 1969
Buku Teks SO
Sawyer, Donald T.
John Wiley & Sons, 1995
Buku Teks SO
Crow, D.R.
Chapman and Hall, 1988
Buku Teks
Mckenna, N.A.
Macmillan, 1939
Buku Teks SO
Gordon G. Wallace, Geoffrey M. Spinks, Leon A. P. Kane-Maguire, Peter R. Teasdale, editor
CRC Press, Taylor & Francis Group, 2009
Buku Teks SO