Donaldson, Bruce
German: an essential grammar
Routledge, 2006
 Buku Teks
Coggle, Paul
Further German : an advanced course / Paul Coggle and Susanne Staab
NTC Publishing Group, 1994
 Buku Teks
Donaldson, Bruce
Mastering German vocabulary : a practical guide to troublesome words
Routledge, 2004
 Buku Referensi
Hachenburger, Petra
Topics, questions, keywords : a handbook for students of German / Petra Hachenburger and Paul Jackson
Routledge, 2000
 Buku Referensi
Stocker, Paul, 1971-
A student grammar of German
Cambridge University Press, 2012
 Buku Teks