Brzezinski, Zbigniev K.
The grand failure : the birth and death of communism in the twentieth century
Collier Books, 1990
 Buku Teks
Brzezinski, Zbigniev K.
The Grand failure : the birth and death of communism in the twentieth century
Chartes Scribner's, 1989
 Buku Teks
Russel, Fox Hon
Justice in the twenty-first century
Covendish Publishing Limited, 2000
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Baker, Stanley B.
School counselling for the twenty-first century
Prentince-Hall, 1996
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Finegan, Edward
Language in the USA: themes for the twenty-first century
Cambridge University Press, 2006
 Buku Teks