Giles, J. P.
Rigby, 1962
Buku Teks
Gildersleeve, B.L., author
Macmillan, 1948
Buku Teks
Murray, John D. (John Damian), author
Routledge, 2001
Buku Teks
Miell, Anna, author
Routledge, 2006
Buku Teks
Fairhead, J. N.
English Universities Press, 1965
Buku Teks