Finch, John, author
Sweet & Maxwell, 1974
Buku Teks
Kelsen, Hans, author
Clarendon Press Oxford, 1992
Buku Teks
Finch, John, author
Sweet & Maxwell, 1970
Buku Teks
edited by Marylin J. Raisch
Oceana, 1995
Buku Teks
Farrar, John H., author
Sweet and Maxwell, 1977
Buku Teks