Drinker, Henry S.
Columbia University Press, 1965
Buku Teks
Reynolds, Henry
Victoria Penguin Book, 1988
Buku Teks
Cameron, J.M., author
British Council, 1884
Buku Teks
Hackett, Francis
Bantam Books, 1958
Buku Teks
Pollard, A.F.
Longman , 1951
Buku Teks