Ely, John Hart, author
Harvard University Press, 1980
Buku Teks
Zurn, Christopher F., author
Cambrigde University Press , 2009
Buku Teks
Omar, Imtiaz, author
Kluwer Law International, 1996
Buku Teks
Carr, Robert K., author
Rinehart, 1942
Buku Teks
Downs, Anthony, author
Harper and Row, 1975
Buku Teks