Gotz, Dieter, author
Langenscheidt, 1993
Buku Referensi
by Peter Terrel [and others]
Harper Collins Publisher, 1991
Buku Referensi
Menge, Herman, author
Berlin Langenscheidt 1961
Buku Referensi
Ruhnel, Paul
Munchen George Muller 1914
Buku Teks
Ruhnel, Paul
Munchen George Muller 1914
Buku Teks