Feinberg, Richard E.
Norton, 1983.
Buku Teks
Hollick, Ann L.
Princeton University press, 1981
Buku Teks
Kissinger, Henry A., author
Weidenfeld & Nicolson, 1969
Buku Teks
Langdon, Robert M., author
Littlefield Adams, 1961
Buku Teks
Leopold, Richard W., author
Alfred A. Knopf, 1962
Buku Teks