Wade, Terence
The Oxford Russian : grammar and verbs
New York : Oxford University Press, 2002
 Buku Referensi
CHalker, Sylvia
The Oxford dictionary of English grammar
Clarendon Press, 1994
 Buku Referensi
Dreyer, Hilke
A practice grammar of German
Verlag fur Deutsch , 1994
 Buku Teks
Hopkins, Diana
Cambridge grammar for ielts with answers: self-study grammar reference and practice
Cambridge University Press, 2011
 Buku Teks
Ur, Penny
Grammar practice activities : a practical guide for teachers
Cambridge University Press, 1988
 Buku Teks