edited by Judy Pearsall, Bill Trumble
Oxford University Press, 1995
Buku Referensi
edited by Della Thompson
Oxford University Press, 1996
Buku Referensi
Oxford Univesity Press, 1994
Buku Referensi
Blackburn, Simon, author
Oxford University Press, 2005
Buku Referensi
Allaby, Michael, editor
Oxford University Press, 1992
Buku Referensi