Singh, Chhatrapati
Oxford University Press , 1986
Buku Teks
Antonio Cassese, editor
Oxford university press, 2012
Buku Teks
More, Thomas
David Campbell Publishers, 1992
Buku Referensi
Singh, Nagendra Kumar
Stevens and Sons, 1983
Buku Teks
Singh, Madanjeet
New York Graphic Society, 1956
Buku Referensi