Quigley, Harold S., author
University of Minnesota Press, 1956
Buku Teks
McNelly, Theodore, author
Houghton Mifflin, 1972
Buku Teks
Maki, John M.
Frederick A. Praeger, 1962
Buku Teks
Maki, John M.
Thames and Hudson, 1962
Buku Teks
Richardson, Bradley M., author
Harper Collins, 1984
Buku Teks