Rawlings, Philip
Longman, 1999
Buku Teks
Rawlings, Philip
Longman, 1999
Buku Teks SO
Holdsworth, William, Sir
Methuen, 1938
Buku Teks SO
Hanbury, Harold Grenville
Methuen, 1956
Buku Teks
Plucknett, Theodore F. T.
Little, Brown and Company, 1956
Buku Teks