Bennett, Martyn
Routledge, 2000
Buku Teks SO
Lyon, Bryce
Harper and Brothers, 1960
Buku Teks
Chesterton, Gilbert Keith, 1874-1936
Chatto , 1951
Buku Teks SO
Trevelyan, George Macaulay, 1876-1962
Methuen, 1949
Buku Teks SO
Milner, Frederic
Macmillan, 1931
Buku Teks