Norris, R.
Melbourne University Press, 1975
Buku Teks
edited, James Vinson
ST. James Press, 1985
Buku Teks
Underhill, Frank H., author
Duke University Press, 1956
Buku Teks
Foreign and Commonwealth Office
Her Majesty's Stationery Office, 1986
Buku Referensi
Mansergh, Nicholas, author
Royal Institute Of International Affair, 1954
Buku Teks