Thakur, Ramesh, editor
London: Westview Press, 1986,
Buku Referensi
University of California Press, 1947
Buku Teks
Barber, Laurie
Century Hutchinson, 1989
Buku Teks
Todd, Stephen, author
Kluwer Law International, 2011
Buku Teks
Mulgan, Richard, author
Oxford University Press, 1989
Buku Teks