Textor, A.M., author
Hamburg, Rowohlt Taschenbuch, 1958
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Menge, Herman, author
Berlin Langenscheidt 1961
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Aetius, Br., compiler
Jakarta: Erlangga, 1992,
Buku Referensi
Mackensen, Lutz, author
Munchen Sudwest 1986
Buku Referensi
Tubingen Max Niemeyer 1980
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