Bradgate, Robert, author
Butterworth, 1991
Buku Teks
Simpson, Laurence P., author
Alexander Hamilton Institute, 1961
Buku Teks
White, James J., author
St. Paul, Minn, 1995
Buku Teks
Braucher, Robert, author
Foundation Press, 1977
Buku Teks
Hung, William S.H., author
[Publisher not identified], 1932
Buku Teks