Drake, Henry Burgess, author
Oxford University Press, 1951
Buku Teks
Drake, Henry Burgess, author
Oxford University, 1957
Buku Teks
Wilson, John B., author
Longmans Green , 1958
Buku Teks
Lerner, Laurence D., author
Oxford University Press, 1954
Buku Teks
Eaglestone, Robert, author
Routledge , 2005
Buku Teks