Montgomery, Robert L., author
Little, Brown, 1962
Buku Teks
Collie, Joanne, author
Cambridge University Press, 1990
Buku Teks
Singh, Jagjit, author
Dover, 1966
Buku Teks
Collie, Joanne, author
Cambridge University Press, 1987
Buku Teks
Whitehead, Alfred North, 1861-1947, author
The New American Library, 1933
Buku Teks