Gauger, Hans-Martin
VEB Verlag Sprache und Literatur, 1962
Buku Teks
Thornborrow, Joanna
New York Routledge , 1998
Buku Teks
Ruqaiya Hasan, author
Oxford University Press,, 1989
Buku Teks
Cambridge University Press, 2007
eBooks
Simpson, Paul, author
Routledge , 2004
Buku Teks