See Allo

Statistics for the twenty-first century

edited by Florence S. Gordon and Sheldon Gordon

Mathematical Association of America, 1992

Buku Teks SO

Communication in the twenty-first century

edited by George Gerbner, Richard B. Byrne

John Wiley & Sons, 1981

Buku Teks

Russel, Fox Hon

Justice in the twenty-first century

Covendish Publishing Limited, 2000

Buku Teks

Public administration for the twenty-first century

by Phillip J. Cooper [and others]

Harcourt, Brace, 1998

Buku Teks

Baker, Stanley B.

School counselling for the twenty-first century

Prentince-Hall, 1996

Buku Teks