SESRIC, {s.a.}
Majalah, Jurnal, Buletin
Chufrin, Gennady, author
Vekas Publishing House, 1976
Buku Teks
Aubrey, Henry G., author
Frederick A. Praeger, 1967
Buku Teks
Frank, Isaiah
Md. Johns Hopkins University Press, 1980
Buku Teks
Ronaldo Maulyadi, author
2014
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