Choppin, Gregory Robert, author
Pergamon Press, 1980
Buku Teks
Williams, David A.R., author
ACOL, 1986
Buku Teks
Halliday, David, 1916-2010, author
John Wiley & Sons, 1960
Buku Teks
Cork, James M.
"Princeton: D Van Nostrand, 1957",
Buku Teks
Kissinger, Henry A., author
Harrper and Brothers, 1957
Buku Teks