editor, F.G. Jacobs
Clarendon Press, 1987
Buku Referensi
editor, F.G. Jacobs
Clarendon Press, 1985
Buku Referensi
Christoph Herrmann
Springer, 2012
eBooks
Council of Europe
Martinus Nijhoff Publishers, 1990
Buku Referensi
Erwin Ramedhan, author
2005
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