Stocker, Paul, 1971-
A student grammar of German
Cambridge University Press, 2012
 Buku Teks SO
Coggle, Paul
Further German : an advanced course / Paul Coggle and Susanne Staab
NTC Publishing Group, 1994
 Buku Teks SO
Miell, Anna
Intermediate German : a grammar and workbook
Routledge, 2006
 Buku Teks SO
Donaldson, Bruce
German: an essential grammar
Routledge, 2006
 Buku Teks SO
Coggle, Paul
Complete German
Kesaint Blanc, 2011
 Buku Teks SO