Ehrenzweig, Albert A.
West Publishing, 1959
Buku Teks
Collier, John Greenwood
Cambridge University Pers, 1994
Buku Teks
Mayss, Abla J.
Cavendish, 1994
Buku Teks
Rutter, William A.
s.n., 1973
Buku Teks
edited by J.H.C. Morris
[Publisher not identified], 1973
Buku Teks