Jia, Lin, author
Foreign languages Press, 2010
Buku Teks
Newman, Arnold
Fact on File, 1990
Buku Teks
N.Y. The Rockefeller Foundation , 1986
Buku Teks
Jahne, Johannes, author
Leipzig, 1964
Buku Teks
Hasan, Mushirul, author
Oxford University Press, 2016
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