Goodfellow, Geoff, author
Wakefield, 1992
Buku Teks
Toynbee, Arnold J., translator
Osford University Press, 1969
Buku Teks
Chicago : The Modern Poetry Association
Majalah, Jurnal, Buletin
Midgley, Mary, author
Routledge, 2006
Buku Teks
O`Dowd, Bernard, author
Angust & Robertson, 1963
Buku Teks