Plumb, J.H.
The British Council by Longmans, Green, 1971
Buku Teks
Darbishire, Helen, 1881-1961, author
Oxford University Press, 1949
Buku Teks
Birkett, Lord, author
Penguin Books, 1961
Buku Teks
Iacocca, Lee
Bantam Books, 1984
Buku Teks
Chappy Hakim, author
Gramedia, 2005
Buku Teks