Denning, Sir Alfred
Stevens & Sons Limited, 1955
Buku Teks
edited by Malcolm W. Klein
Sage, 1976
Buku Teks
Champion, Dean J.
Pearson/Prentice Hall, 2006
Buku Teks
Heyde, Wolfgang
C.F. Muller Juristischer Verlag, 1999
Buku Teks
Rawls, John
Harvard University Press, 2003
Buku Teks