Charlton, Ruth
Lawbook, 2004
Buku Teks
Kurtz, Max
McGraw-Hill, 1991
Buku Referensi
edited by Frederick C. Allard
McGraw-Hill, 1990
Buku Referensi
edited by Frederick C. Allard
McGraw-Hill, 1989
Buku Referensi
Gardner, Fletcher
Henry Kimpton, 1914
Buku Teks