McKeane, Alasdair
German
Longman, 1994
Buku Teks
Bellow's German dictionary German - English, English - German
London, London Longmans
Buku Referensi
Wessels, Dieter
Business German
Macmillan, 1992
Buku Teks
Weiss, Edda
German vocabulary
McGraw-Hill, 1986
Buku Teks
German verbs
Buku Teks