Carey, Graham F.
Prentice-Hall, [Date of publication not identified]
Buku Teks SO
Owen, D.R.J.
UK Pineridge Press, 1980
Buku Teks SO
Naylor, D.J.
Pineridge Press, 1981
Buku Teks SO
Akin, J.E.
Academic Press, 1994
Buku Teks
Scheid, Francis
Addison-Wesley, 1962
Buku Teks SO