Cotterell, Arthur, author
Lorenz Books, 2013
Buku Teks
Cotterell, Arthur, author
Lorenz Books, 2000
Buku Referensi
Moncrieff, A.R. Hope, author
Gramercy Books, 1995
Buku Referensi
Whittock, Martyn, author
Running Press, 2013
Buku Teks
Bacon, Roy, author
Sunburst Books, 1995
Buku Referensi