Qureshi, Asif Hasan
Sweet & Maxwell/Thomson Reuters, 2011
Buku Teks
Attard, David Joseph
Clarendon Press, 1987
Buku Teks
Calvani, Terry
Little, Brown, 1988
Buku Teks
Kohona, Palitha T.B.
Martinus Nijhoff, 1985
Buku Teks
Christoph Herrmann
Springer, 2012
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