White, John, author
The Overseas Development Institute, 1967
Buku Teks
Oxford University Press, 1998
Buku Teks
Little, Ian M.D.
George Allen and Unwin, 1965
Buku Teks
Mason, Edward S.
Published for the Council on Foreign Relations by Harper & Row, 1964
Buku Teks
Jordan, Amos A., author
Praeger, 1962
Buku Teks