Mayss, Abla J., author
Cavendish, 1994
Buku Teks
Ehrenzweig, Albert A., author
West Publishing, 1959
Buku Teks
Graveson, R.H.
Sweet & Maxwell, 1969
Buku Teks
Humphrey, John, author
A.W. Sijthoff, 1978
Buku Teks
Castel, J.G.
Butterworth, 1986
Buku Teks