edited by Susan Bambrick
Cambridge University Press, 1994
Buku Referensi
Andrew, Nancy Learmonth, compiled
Frederick Warne & Co , 1973
Buku Referensi
Crystal, David, 1941-, author
Cambridge University Press, 1994
Buku Referensi
Crystal, David, 1941-, author
Cambridge University Press, 1995
Buku Referensi
edited by Adrian Friday, David S. Ingram
Cambridge University Press, 1985
Buku Referensi