Arblaster, Anthony
Democracy
Open University Press, 1987
Buku Teks
Schulz, Ernest B
Democracy
[publisher not identified], 1956
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Climate change and sustainable futures
Artikel Jurnal
Catt, Helena
Democracy in practice
Routledge , 1999
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Mackie, Gerry
Democracy defended
Cambridge University Press, 2003
Buku Teks