Datta, Bhabatosh
Tata McGraw-Hill, 1978
Buku Teks
Das, Arvind N.
Erasmus University, 1986
Buku Teks
Konark, 1998
Buku Teks
Foreign Service Institute in association with Konark Publishers, 1998
Buku Teks
New delhi:Indian Information service, 1951
Buku Teks