Drake, Henry Burgess, author
Oxford University, 1957
Buku Teks
Drake, Henry Burgess, author
Oxford University Press, 1951
Buku Teks
Lerner, Laurence D., author
Oxford University Press, 1954
Buku Teks
Wilson, John B., author
Longmans Green , 1958
Buku Teks
French, F. G., author
Oxford University Press, 1947
Buku Teks