Drews, Jurgen
Roches, 1990
Buku Teks
Drews, Jurgen
Springer-Verlag, 1990.
Buku Teks SO
Williams, Katherine S.
Blackstone Press, 1997
Buku Teks
Houston, William John Ballantyne
Butterworth-Heinemann, 1992
Buku Teks SO
Jones, Michael A.
Blackstone Press Limited, 2000
Buku Referensi