Collins German college dictionary
Harper Collins Publisher, 1995
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The Oxford-duden German dictionary
Clarendon Press, 1990
Buku Referensi
Collins German dictionary
Harper Collins Publisher, 1991,
Buku Referensi
Shaw, Gisela
Pocket dictionary of business German
Hodder & Stoughton, 1995
Buku Referensi
Dictionary
London: Tiger Books International, 1994,
Buku Referensi