Neumann, Lothar F., author
Bundeszentrale fuur Politische Bildung, 1983
Buku Teks
Ropke, Wilhelm
Eugen Rentsch Verlag, 1961
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Myrdal, Gunnar, 1898-, author
Routledge & Kegan Paul, 1955
Buku Teks
Ropke, Wilhelm
Elsevier , 1947
Buku Teks
Dodi Hermawan, author
2015
UI - Tesis (Membership)