Moodie, Graeme C., author
Crowell, 1971
Buku Teks
Plaskitt, Harold, author
University Tujorial Press, 1950
Buku Teks
Viton, Albert, author
John Day Company, 1940
Buku Teks
Viton, Albert, author
John Day Company, 1940
Buku Teks
Campion, H., author
Oxford University Press, 1939
Buku Teks