Scholz, Arno
Arani Verlags-Gmbh, 1961
Buku Teks
Berlin, Normand
Macmillan Education, 1988
Buku Teks
Gray, John, author
HarperCollins , 1995
Buku Teks
Hunningher, B
Amsterdam Noord Hollandse uitgevers 1956
Buku Teks
Slonim, Marc, author
Collier Books, 1962
Buku Teks