Association of Commonwealth Universities, 1976
Buku Teks SO
Hannah, H.W., author
University of Illionois Press, 1966
Buku Teks
Mansergh, Nicholas, author
Royal Institute Of International Affair, 1948
Buku Teks
The Association of Commonwealth Universities,
Buku Referensi
Jennings, Ivor, Sir, 1903-1965, author
Clarendon Press, 1957
Buku Teks