Beard, Charles A., author
Free Press, 1986
Buku Teks
Corwin, Edward S., author
Government Printing Office, 1953
Buku Teks
Corwin, Edward S., author
U.S. Government Printing Office, 1953
Buku Teks
Corwin, Edward S., author
Government Printing Office, 1953
Buku Teks
Mitchell, Broadus, author
Oxford University Press, 1964
Buku Teks