Fenwick, Charles G.
Appleton-Century-Crofts, 1948
Buku Teks
Schwarzenberger, Georg
Stevens & Sons, 1949
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Wallace, Rebecca M. M.
Sweet & Maxwell, 1997
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Carter, Barry E.
Aspen Law & Business, 1999
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Cassese, Antonio, 1937-2011
Oxford University Press, 2001
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