London :The Poetry Society Inc
Majalah, Jurnal, Buletin
Mahood, M. M.
The Camelot Press, 1950
Buku Teks
Andrews, Richard, author
Open University Press, 1991
Buku Teks
Pope, Alexander, 1688-1744.E
The Clarendon press, 1933
Buku Teks
Wals, Chad, author
Prentice-Hall, 1962
Buku Teks