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Westview Press, 1978
Buku Teks
Cooley, Thomas M.
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Buku Teks
Koopmans, Tim
Cambridge University Press, 2003
Buku Teks
Powell, G. Bingham
Pearson Education, 2015
Buku Teks
Bogdan, Michael
Kluwer Norstedts Juridik Tano, 1994
Buku Teks