edited by Daniel Miller
Routledge, 1995
Buku Teks
Russell, Richard Joel
Macmillan, 1954, 1951
Buku Teks
Russell, Richard Joel
Macmillan, 1958
Buku Teks
Achebe, Chinua
Everyman's Library , 1992
Buku Referensi
edited by John McLaren
Longman Cheshire, 1983
Buku Teks