Greed, Clara H., author
Longman, 1994
Buku Teks
Brown, A.J., author
Melbourne University Press, 1951
Buku Teks
Gillie, F.B., author
The Hague, 1971
Buku Teks
edited by Andrew Blowers and Bob Evans
Routledge, 1997
Buku Teks
edited by Andrew Blowers, Bob Evans
Routledge, 1997
Buku Teks