Graveson, R.H.
Sweet & Maxwell, 1969
Buku Teks
Graveson, R.H.
Sweet & Maxwell, 1974
Buku Teks
Collier, John G. (John Greenwood), author
Cambridge University Press, 1994
Buku Teks
Collier, John G. (John Greenwood), author
Cambridge University Press, 1987
Buku Teks
Mayss, Abla J., author
Cavendish, 1994
Buku Teks