Singh, Chhatrapati
Oxford University Press, 1985
Buku Teks
Singh, Chhatrapati
Oxford University Press , 1986
Buku Teks
Antonio Cassese, editor
Oxford university press, 2012
Buku Teks
More, Thomas, author
David Campbell Publishers, 1992
Buku Referensi
Singh, Nagendra Kumar
Stevens and Sons, 1983
Buku Teks