McCarthy, Frederick D.
A Colorgravure , [Date of publication not identified]
Buku Teks
Moore, Russell F.
Littlefield, Adams, 1957
Buku Teks
Finer, S. E.
Clarendon Press Oxford, 1995
Buku Teks
Andrews, William G.
D.van Nostrand Company,Inc., 1968
Buku Teks
Gibson, William M.
Duke University Press, 1948
Buku Teks