Berlmas, Genelle, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Holsinger, Ralph L., author
McGraw-Hill, 1994
Buku Teks
Smith, J. C. (James Cruickshanks), 1867-1946, author
Sweet & Maxwell, 1989
Buku Teks
Kelsen, Hans, author
Holt, Rinehart and Winston, 1967
Buku Teks
Goldstein, Paul, author
Little, Brown, 1989
Buku Teks