Thomas, Paul I., author
McGraw-Hill, 1977
Buku Teks
Reed, Prentiss B., author
McGraw-Hill, 1953
Buku Teks
Bernhardt, Roger
St. Paul, Minn, 1991
Buku Teks
Emanuel, Steven, author
Emanuel Law Outlines, 1993
Buku Teks
Bernhardt, Robert, author
West Publishing, 1991
Buku Teks