Chicago : The Modern Poetry Association
Majalah, Jurnal, Buletin
DiYanni, Robert
McGraw-Hill, 2000
Buku Teks SO
Drake, Barbara
Harcourt Brace College, 1994
Buku Teks SO
Hutchinson, G.O.
Clarendon Press, 1990
Buku Referensi
edited by Michael Hulse, David Kennedy and David Morley
Bloodaxe Books, 1993
Buku Teks SO