Wery, Robbert Frans
[publisher not identified], 1948
Buku Klasik
Gujral, I.K.
The External Publicity Divisons, Ministry of Esternal Affair, 1998
Buku Teks SO
edited by A.B. Shah
Manaktalas, 1966
Buku Teks SO
Dixit, J.N. (Jyotindra Nath), 1936-2005
Routledge, 2002
Buku Teks SO
Sharan, P.
Metropolitan, 1984
Buku Teks SO