edited by A.W. Ward and A.R. Waller
Macmillan, 1939
Buku Teks
Sampson, George, author
University Press, 1949
Buku Referensi
Sampson, George, author
University Press, 1959
Buku Teks
Sampson, George, author
Cambridge University Press, 1972.
Buku Teks
edited by Ian Ousby
Cambridge University Press, 1993
Buku Referensi