Gray, John, author
Routledge , 1996
Buku Teks
Bowle, John
J. Cape, 1947
Buku Teks
Sharma, R.P., author
Sterling Publishers Private, 1984
Buku Teks
edited by Isaac Kramnick
[publisher not identified], 1969
Buku Teks
Ebenstein, William, author
Holt, Rinehart and Winston, 1962
Buku Teks