Keir, D. L. (David Lindsay), author
Oxford, 1959
Buku Teks
Post, Gordon C.
The Liberal Arts Press, 1957
Buku Teks
Ivamy, E.R. Hardy, author
Butterworth, 1977
Buku Teks
Ivamy, E.R. Hardy
Llod's of London Press, 1082
Buku Teks
Foulkes, David, 1924-, author
Butterworth, 1968
Buku Teks