Thornborrow, Joanna
New York Routledge , 1998
Buku Teks
Jos, Mullie, author
The Bureau of Engraving and Printing, 1932
Buku Teks
Coulthard, Malcolm, author
Routledge, 2017
Buku Teks
Cruse, Alan, author
Oxford University Press, 2013
Buku Teks
Devito, Joseph A., author
Random House, 1970
Buku Teks