Dodd, Walter Fairleigh, 1880-1960, author
West Publishing, 1949
Buku Teks
Stone, Geoffrey R.
Little, Brown and Company, 1991
Buku Teks
Wade, E. C. S. (Emlyn Capel Stewart), author
Longmans Green, 1951
Buku Teks
Schmitt, Carl, author
Duke University Press, 2008
Buku Teks
Wade, E. C. S. (Emlyn Capel Stewart), author
[publisher not identified], [date of publication not identified]
Buku Teks