Redmond, Peter W. D., author
The M & E Handbook Series, 1993
Buku Teks
Barendt, E. M., author
Oxford University Press, 1998
Buku Teks
Foulkes, David, 1924-, author
Butterworth, 1968
Buku Teks
Gower, L.C.B.
Stevens , 1957
Buku Teks
Gower, L.C.B.
Stevens and Sons, 1969
Buku Teks