P. R. Gandhi, editor
Blackstone Press limited, 2000
Buku Teks
edited by P.R. Ghandhi.
Blackstone Press, 2000
Buku Referensi
Selby, David
Cambridge University Press, 1988
Buku Teks
editor, Jonathan M. Mann
Routledge, 1999
Buku Teks
The John Hopkins University Press, 1976
Buku Teks