Omar, Imtiaz
Kluwer Law International, 1996
Buku Teks
Carr, Robert K.
Rinehart, 1942
Buku Teks
Ely, John Hart
Harvard University Press, 1980
Buku Teks
Gabin, Sanford Byron
National University Publications, 1980
Buku Teks
Zurn, Christopher F.
Cambrigde University Press , 2009
Buku Teks