Fisher, Roger, author
Harper Torchbooks, 1969
Buku Teks
Hackworth, Green Haywood, author
Government Printing Office, 1943
Buku Teks
Moore, John B.
Government Printing Office, 1906
Buku Teks
Gardner, Richard N., author
Dell Publishing, 1965
Buku Teks
Graham, Malbone W.
Johns Hopkins Press, 1948
Buku Teks