Mehren, Arthur Taylor von, author
Little,Brown and Company, 1957
Buku Teks
Schlesinger, Rudolf B.
The Foundation Press, 1950
Buku Teks
Universitas Indonesia, 2014
UI - Skripsi (Membership)
Schlesinger, Rudolf B.
The Foundation Press, 1950
Buku Klasik
Zoller, Elisabeth, author
Martinus Nijhoff, 2008
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